diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..bee8a64
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+__pycache__
diff --git a/README.md b/README.md
index 75f9a22..d1f5e2e 100644
--- a/README.md
+++ b/README.md
@@ -10,4 +10,7 @@
 - Day  8: 61:00 and 10:00 for leaderboard; I need template code for searching coordinate systems
 - Day  9: 58:00 and 7:32 for leaderboard; I need code for 2D stuff
 - Day 10: 25:20 and 12:17 for leaderboard; okay, okay
-- Day 11:
+- Day 11: 45:00 and 18:00 for leaderboard; arg, it was doable man
+- Day 12: 39:45 and 9:46 for leaderboard; the people are ready for there searches :D
+- Day 13: 44:00 and 12:56 for leaderboard; these people are just good, seriously
+- Day 14:
diff --git a/d11.py b/d11.py
new file mode 100644
index 0000000..c21beae
--- /dev/null
+++ b/d11.py
@@ -0,0 +1,143 @@
+import re
+from string import ascii_lowercase, ascii_uppercase
+
+def extract_single_digit(line: str) -> int:
+    r = re.compile(r"\d+")
+    for m in r.findall(line):
+        return int(m)
+    raise Exception("No single digit sequence in '{line}'")
+
+def extract_digits_list(line: str) -> list[int]:
+    r = re.compile(r"\d+")
+    return list(map(int, r.findall(line)))
+
+EXAMPLE = """
+Monkey 0:
+  Starting items: 79, 98
+  Operation: new = old * 19
+  Test: divisible by 23
+    If true: throw to monkey 2
+    If false: throw to monkey 3
+
+Monkey 1:
+  Starting items: 54, 65, 75, 74
+  Operation: new = old + 6
+  Test: divisible by 19
+    If true: throw to monkey 2
+    If false: throw to monkey 0
+
+Monkey 2:
+  Starting items: 79, 60, 97
+  Operation: new = old * old
+  Test: divisible by 13
+    If true: throw to monkey 1
+    If false: throw to monkey 3
+
+Monkey 3:
+  Starting items: 74
+  Operation: new = old + 3
+  Test: divisible by 17
+    If true: throw to monkey 0
+    If false: throw to monkey 1
+"""
+
+def clean(text: str) -> list[str]:
+    return list(filter(lambda l: l.strip() != "", text.splitlines()))
+
+def get_monkesy(lines):
+    monkeys = []
+    for i, line in enumerate(lines):
+        if line.startswith("Monkey"):
+            d = extract_single_digit(line)
+            monkeys.append([d])
+        elif line.strip().startswith("Starting"):
+            d = extract_digits_list(line)
+            monkeys[-1].append(d)
+        elif line.strip().startswith("Operation"):
+            if "old * old" in line:
+                f = lambda y: y * y
+                monkeys[-1].append(f)
+            elif "*" in line:
+                d = extract_single_digit(line)
+                f = lambda x: (lambda y: x * y)
+                f = f(d)
+                monkeys[-1].append(f)
+            elif "+" in line:
+                d = extract_single_digit(line)
+                f = lambda x: (lambda y: x + y)
+                f = f(d)
+                monkeys[-1].append(f)
+            else:
+                raise Exception(line)
+        elif line.strip().startswith("Test"):
+            d = extract_single_digit(line)
+            monkeys[-1].append(d)
+        elif line.strip().startswith("If true"):
+            d = extract_single_digit(line)
+            monkeys[-1].append(d)
+        elif line.strip().startswith("If false"):
+            d = extract_single_digit(line)
+            monkeys[-1].append(d)
+        else:
+            print(line)
+            raise Exception("Unexpected line.")
+    for m in monkeys:
+        m.append(0)
+    return monkeys
+
+def solve(lines: list[str]):
+    monkeys = get_monkesy(lines)
+    for _ in range(20):
+        for monkey in monkeys:
+            id, items, op, test, if_true, if_false, count = monkey
+            while items:
+                item = items.pop()
+                monkey[6] += 1
+                worry = item
+                worry = op(worry)
+                worry //= 3
+                if worry % test == 0:
+                    monkeys[if_true][1].append(worry)
+                else:
+                    monkeys[if_false][1].append(worry)
+                monkeys[id][1] = monkeys[id][1][1:]
+    counts = sorted([m[6] for m in monkeys])[-2:]
+    return counts[0] * counts[1]
+
+def solve2(lines: list[str]):
+    monkeys = get_monkesy(lines)
+    mod = 1
+    for m in monkeys:
+        mod *= m[3]
+
+    for _ in range(10000):
+        for monkey in monkeys:
+            id, items, op, test, if_true, if_false, count = monkey
+            for item in list(items):
+                monkey[6] += 1
+                worry = item
+                worry = op(worry)
+                worry %= mod
+                if worry % test == 0:
+                    monkeys[if_true][1].append(worry)
+                else:
+                    monkeys[if_false][1].append(worry)
+                monkeys[id][1] = monkeys[id][1][1:]
+    counts = sorted([m[6] for m in monkeys])[-2:]
+    return counts[0] * counts[1]
+
+def main():
+    example = clean(EXAMPLE)
+    print("Example  1:", solve(example))
+
+    data = clean(open("i11.txt").read())
+    print("Solution 1:", solve(data))
+
+    example = clean(EXAMPLE)
+    print("Example  2:", solve2(example))
+
+    data = clean(open("i11.txt").read())
+    print("Solution 2:", solve2(data))
+
+if __name__ == "__main__":
+    main()
diff --git a/d12.py b/d12.py
new file mode 100644
index 0000000..a1bfcb7
--- /dev/null
+++ b/d12.py
@@ -0,0 +1,120 @@
+import lib
+
+EXAMPLE = """
+Sabqponm
+abcryxxl
+accszExk
+acctuvwj
+abdefghi
+"""
+
+def neighbors_4(row, col, rows, cols):
+    n = []
+    for r, c in [(1, 0), (-1, 0), (0, 1), (0, -1)]:
+        new_row, new_col = row + r, col + c
+        if new_row >= 0 and new_row < rows and new_col >= 0 and new_col < cols:
+            n.append((new_row, new_col))
+    return n
+
+def solve(lines: list[str]):
+    start = (0, 0)
+    end = (0, 0)
+    rows = len(lines)
+    cols = len(lines[0])
+    heights = []
+    dists = []
+    for (row, line) in enumerate(lines):
+        heights.append([])
+        dists.append([])
+        for (col, c) in enumerate(line):
+            if c == 'S':
+                start = (row, col)
+                heights[row].append(0)
+                dists[row].append(0)
+            elif c == 'E':
+                end = (row, col)
+                heights[row].append(26)
+                dists[row].append(2**16)
+            else:
+                heights[row].append(ord(lines[row][col]) - ord('a'))
+                dists[row].append(2**16)
+
+    active_fields = [start]
+    while active_fields:
+        row, col = active_fields.pop()
+        current_dist = dists[row][col]
+        current_height = heights[row][col]
+        for row, col in neighbors_4(row, col, rows, cols):
+            pot_height = heights[row][col]
+            if current_height < pot_height - 1:
+                continue
+            if current_dist + 1 < dists[row][col]:
+                dists[row][col] = current_dist + 1
+                active_fields.append((row, col))
+
+    # for row in dists:
+    #     print(row)
+
+    # 34:00
+    return dists[end[0]][end[1]]
+
+def solve2(lines: list[str]):
+    starts = []
+    all_dists =[]
+    for (row, line) in enumerate(lines):
+        for (col, c) in enumerate(line):
+            if c == 'S' or c == 'a':
+                starts.append((row, col))
+
+    for start in starts:
+        end = (0, 0)
+        rows = len(lines)
+        cols = len(lines[0])
+        heights = []
+        dists = []
+        for (row, line) in enumerate(lines):
+            heights.append([])
+            dists.append([])
+            for (col, c) in enumerate(line):
+                if row == start[0] and col == start[1]:
+                    heights[row].append(0)
+                    dists[row].append(0)
+                elif c == 'E':
+                    end = (row, col)
+                    heights[row].append(26)
+                    dists[row].append(2**16)
+                else:
+                    heights[row].append(ord(lines[row][col]) - ord('a'))
+                    dists[row].append(2**16)
+
+        active_fields = [start]
+        while active_fields:
+            row, col = active_fields.pop()
+            current_dist = dists[row][col]
+            current_height = heights[row][col]
+            for row, col in neighbors_4(row, col, rows, cols):
+                pot_height = heights[row][col]
+                if current_height < pot_height - 1:
+                    continue
+                if current_dist + 1 < dists[row][col]:
+                    dists[row][col] = current_dist + 1
+                    active_fields.append((row, col))
+        all_dists.append(dists[end[0]][end[1]])
+    # 39:45
+    return min(all_dists)
+
+def main():
+    lines = lib.str_to_lines_no_empty(EXAMPLE)
+    print("Example  1:", solve(lines))
+
+    lines = lib.str_to_lines_no_empty(open("i12.txt").read())
+    print("Solution 1:", solve(lines))
+
+    lines = lib.str_to_lines_no_empty(EXAMPLE)
+    print("Example  2:", solve2(lines))
+
+    lines = lib.str_to_lines_no_empty(open("i12.txt").read())
+    print("Solution 2:", solve2(lines))
+
+if __name__ == "__main__":
+    main()
diff --git a/d13.py b/d13.py
new file mode 100644
index 0000000..35b03e7
--- /dev/null
+++ b/d13.py
@@ -0,0 +1,115 @@
+import lib
+
+EXAMPLE = """[1,1,3,1,1]
+[1,1,5,1,1]
+
+[[1],[2,3,4]]
+[[1],4]
+
+[9]
+[[8,7,6]]
+
+[[4,4],4,4]
+[[4,4],4,4,4]
+
+[7,7,7,7]
+[7,7,7]
+
+[]
+[3]
+
+[[[]]]
+[[]]
+
+[1,[2,[3,[4,[5,6,7]]]],8,9]
+[1,[2,[3,[4,[5,6,0]]]],8,9]
+"""
+
+def right_order(a, b):
+    if not a and not b:
+        return None
+    elif not a:
+        return True
+    elif not b:
+        return False
+
+    l, r = a[0], b[0]
+    if type(l) is int and type(r) is int:
+        if l < r:
+            return True
+        elif l > r:
+            return False
+        else:
+            return right_order(a[1:], b[1:])
+
+    if type(l) is int:
+        l = [l]
+    if type(r) is int:
+        r = [r]
+
+    o = right_order(l, r)
+    if o is not None:
+        return o
+    return right_order(a[1:], b[1:])
+
+def solve(lines: list[str]):
+    res = 0
+    pairs = [[]]
+    for (i, line) in enumerate(lines):
+        if line.strip() == "":
+            pairs.append([])
+        else:
+            pairs[-1].append(eval(line))
+    for i, p in enumerate(pairs):
+        if not len(p) == 2:
+            continue
+        a, b = p[0], p[1]
+        o = right_order(a, b)
+        if o is True:
+            res += i + 1
+        if o is None:
+            raise Exception("NO DECISION")
+    # 37:00
+    return res
+
+def solve2(lines: list[str]):
+    res = 0
+
+    packets = list(map(eval, lines))
+    p1 = [[2]]
+    packets.append(p1)
+    p2 = [[6]]
+    packets.append(p2)
+
+    resorted = True
+    while resorted:
+        resorted = False
+        for i in range(len(packets) - 1):
+            if not right_order(packets[i], packets[i + 1]):
+                packets[i], packets[i + 1] = packets[i + 1], packets[i]
+                resorted = True
+    p1i, p2i = 0, 0
+    for (i, p) in enumerate(packets):
+        if p == p1:
+            p1i = i + 1
+        elif p == p2:
+            p2i = i + 1
+    print(p1i, p2i)
+    # 44:00
+    return p1i * p2i
+
+def main():
+    lines = lib.str_to_lines(EXAMPLE)
+    print("Example  1:", solve(lines))
+
+    lines = lib.str_to_lines(open("i13.txt").read())
+    print("Solution 1:", solve(lines))
+
+    lines = lib.str_to_lines_no_empty(EXAMPLE)
+    print("Example  2:", solve2(lines))
+
+    lines = lib.str_to_lines_no_empty(open("i13.txt").read())
+    print("Solution 2:", solve2(lines))
+
+if __name__ == "__main__":
+    main()
diff --git a/dx.py b/dx.py
index ed32b04..61e8a65 100644
--- a/dx.py
+++ b/dx.py
@@ -1,39 +1,37 @@
-import re
-from string import ascii_lowercase, ascii_uppercase
+import lib
 
 EXAMPLE = """
 """
 
-def clean(text: str) -> list[str]:
-    return list(filter(lambda l: l.strip() != "", text.splitlines()))
-
 def solve(lines: list[str]):
     res = 0
-    for i, line in enumerate(lines):
+    for (i, line) in enumerate(lines):
         print(i, line)
+        # digits = lib.str_to_int_list(line)
+        # digit = lib.str_to_single_int(line)
     return res
 
 def solve2(lines: list[str]):
     res = 0
-    for i, line in enumerate(lines):
+    for (i, line) in enumerate(lines):
         print(i, line)
     return res
 
 def main():
-    example = clean(EXAMPLE)
-    print("Example  1:", solve(example))
+    lines = lib.str_to_lines_no_empty(EXAMPLE)
+    print("Example  1:", solve(lines))
     return
 
-    data = clean(open("i6.txt").read())
-    print("Solution 1:", solve(data))
+    lines = lib.str_to_lines_no_empty(open("ix.txt").read())
+    print("Solution 1:", solve(lines))
     return
 
-    example = clean(EXAMPLE)
-    print("Example  2:", solve2(example))
+    lines = lib.str_to_lines_no_empty(EXAMPLE)
+    print("Example  2:", solve2(lines))
     return
 
-    data = clean(open("i6.txt").read())
-    print("Solution 2:", solve2(data))
+    lines = lib.str_to_lines_no_empty(open("ix.txt").read())
+    print("Solution 2:", solve2(lines))
 
 if __name__ == "__main__":
     main()
diff --git a/i11.txt b/i11.txt
new file mode 100644
index 0000000..ef22f88
--- /dev/null
+++ b/i11.txt
@@ -0,0 +1,55 @@
+Monkey 0:
+  Starting items: 66, 79
+  Operation: new = old * 11
+  Test: divisible by 7
+    If true: throw to monkey 6
+    If false: throw to monkey 7
+
+Monkey 1:
+  Starting items: 84, 94, 94, 81, 98, 75
+  Operation: new = old * 17
+  Test: divisible by 13
+    If true: throw to monkey 5
+    If false: throw to monkey 2
+
+Monkey 2:
+  Starting items: 85, 79, 59, 64, 79, 95, 67
+  Operation: new = old + 8
+  Test: divisible by 5
+    If true: throw to monkey 4
+    If false: throw to monkey 5
+
+Monkey 3:
+  Starting items: 70
+  Operation: new = old + 3
+  Test: divisible by 19
+    If true: throw to monkey 6
+    If false: throw to monkey 0
+
+Monkey 4:
+  Starting items: 57, 69, 78, 78
+  Operation: new = old + 4
+  Test: divisible by 2
+    If true: throw to monkey 0
+    If false: throw to monkey 3
+
+Monkey 5:
+  Starting items: 65, 92, 60, 74, 72
+  Operation: new = old + 7
+  Test: divisible by 11
+    If true: throw to monkey 3
+    If false: throw to monkey 4
+
+Monkey 6:
+  Starting items: 77, 91, 91
+  Operation: new = old * old
+  Test: divisible by 17
+    If true: throw to monkey 1
+    If false: throw to monkey 7
+
+Monkey 7:
+  Starting items: 76, 58, 57, 55, 67, 77, 54, 99
+  Operation: new = old + 6
+  Test: divisible by 3
+    If true: throw to monkey 2
+    If false: throw to monkey 1
diff --git a/i12.txt b/i12.txt
new file mode 100644
index 0000000..5dab450
--- /dev/null
+++ b/i12.txt
@@ -0,0 +1,41 @@
+abcccccccaaaaaaaaccccccccccaaaaaaccccccaccaaaaaaaccccccaacccccccccaaaaaaaaaaccccccccccccccccccccccccccccccccaaaaa
+abcccccccaaaaaaaaacccccccccaaaaaacccccaaacaaaaaaaaaaaccaacccccccccccaaaaaaccccccccccccccccccccccccccccccccccaaaaa
+abcccccccaaaaaaaaaaccccccccaaaaaacaaacaaaaaaaaaaaaaaaaaaccccccccccccaaaaaaccccccccccccccaaacccccccccccccccccaaaaa
+abaaacccccccaaaaaaacccccccccaaacccaaaaaaaaaaaaaaaaaaaaaaaaacccccccccaaaaaaccccccccccccccaaacccccccccccccccccaaaaa
+abaaaaccccccaaaccccccccccccccccccccaaaaaaaaacaaaacacaaaaaacccccccccaaaaaaaacccccccccccccaaaaccaaacccccccccccaccaa
+abaaaaccccccaaccccaaccccccccccccccccaaaaaaacaaaaccccaaaaaccccccccccccccccacccccccccccccccaaaaaaaaacccccccccccccca
+abaaaaccccccccccccaaaacccccccccaacaaaaaaaacccaaacccaaacaacccccccccccccccccccccccccccciiiiaaaaaaaacccccccccccccccc
+abaaacccccccccccaaaaaacccccccccaaaaaaaaaaacccaaacccccccaacccccccccccaacccccccccccccciiiiiiijaaaaccccccccaaccccccc
+abaaaccccccccccccaaaacccccccccaaaaaaaacaaacccaaaccccccccccccccccccccaaacaaacccccccciiiiiiiijjjacccccccccaaacccccc
+abcccccaacaacccccaaaaaccccccccaaaaaacccccacaacccccccccccccccccccccccaaaaaaaccccccciiiinnnoijjjjjjjjkkkaaaaaaacccc
+abcccccaaaaacccccaacaaccccccccccaaaacccaaaaaaccccccccccccccccccccccccaaaaaaccccccciiinnnnooojjjjjjjkkkkaaaaaacccc
+abccccaaaaacccccccccccccccccccccaccccccaaaaaaaccccccccccccccccccccaaaaaaaaccccccchhinnnnnoooojjooopkkkkkaaaaccccc
+abccccaaaaaaccccccccccccccccccccccccccccaaaaaaacccccccccccccccccccaaaaaaaaacccccchhhnnntttuooooooopppkkkaaaaccccc
+abccccccaaaaccccccccccacccccccccccccccccaaaaaaacccaaccccccccccccccaaaaaaaaaaccccchhhnnttttuuoooooppppkkkaaaaccccc
+abccccccaccccccccccccaaaacaaaccccccccccaaaaaacaaccaacccaaccccccccccccaaacaaacccchhhnnnttttuuuuuuuuupppkkccaaccccc
+abccccccccccccccaaccccaaaaaaaccccccccccaaaaaacaaaaaacccaaaaaaccccccccaaacccccccchhhnnntttxxxuuuuuuupppkkccccccccc
+abcccccccccccccaaaacccaaaaaaacccaccccccccccaaccaaaaaaacaaaaaaccccccccaacccaaccchhhhnnnttxxxxuuyyyuupppkkccccccccc
+abcccccccccccccaaaaccaaaaaaaaacaaacccccccccccccaaaaaaaaaaaaaccccccccccccccaaachhhhmnnnttxxxxxxyyyuvppkkkccccccccc
+abcccccccccccccaaaacaaaaaaaaaaaaaaccccccccccccaaaaaacaaaaaaaccccccccccccccaaaghhhmmmttttxxxxxyyyyvvpplllccccccccc
+abccacccccccccccccccaaaaaaaaaaaaaaccccccccccccaaaaaacccaaaaaacccaacaacccaaaaagggmmmttttxxxxxyyyyvvppplllccccccccc
+SbaaaccccccccccccccccccaaacaaaaaaaacccccccccccccccaacccaaccaacccaaaaacccaaaagggmmmsttxxxEzzzzyyvvvppplllccccccccc
+abaaaccccccccccccccccccaaaaaaaaaaaaacaaccccccccccccccccaaccccccccaaaaaccccaagggmmmsssxxxxxyyyyyyvvvqqqlllcccccccc
+abaaacccccccccccccccccccaaaaaaaaaaaaaaaaacccccccccccccccccccccccaaaaaaccccaagggmmmsssxxxwywyyyyyyvvvqqlllcccccccc
+abaaaaacccccccccccccccccccaacaaaccaaaaaaacccccccccccccccccccccccaaaaccccccaagggmmmssswwwwwyyyyyyyvvvqqqllcccccccc
+abaaaaaccccccccccccccccccccccaaaccccaaaacccccccccccccccccaaccaacccaaccccccccgggmmmmssssswwyywwvvvvvvqqqlllccccccc
+abaaaaacccccccccccccaccacccccaaaccccaaaacccccccccccccccccaaaaaacccccccccccaaggggmllllsssswwywwwvvvvqqqqlllccccccc
+abaaccccccccccccccccaaaaccccccccccccaccaccccccccccccccccccaaaaacccccccccccaaagggglllllssswwwwwrrqqqqqqmmllccccccc
+abaaccccccccccccccccaaaaaccccccaaccaaccccccccccccccccccccaaaaaaccaacccccccaaaaggfffllllsswwwwrrrrqqqqqmmmcccccccc
+abacaaaccccccccccccaaaaaaccccccaaaaaaccccccaacccccccccccaaaaaaaacaaacaaccccaaaaffffflllsrrwwwrrrmmmmmmmmmcccccccc
+abaaaaaccccccccccccaaaaaaccccccaaaaaccccccaaaaccccccccccaaaaaaaacaaaaaaccccaaaaccfffflllrrrrrrkkmmmmmmmccccaccccc
+abaaaacccccccccccccccaaccccccccaaaaaacccccaaaacccccccccccccaaccaaaaaaaccccccccccccffflllrrrrrkkkmmmmmccccccaccccc
+abaaacccccccccccccccccccccccccaaaaaaaaccccaaaacccccccccccccaaccaaaaaaacccccccccccccfffllkrrrkkkkmddddcccccaaacccc
+abaaacccccccccccccccccccccccccaaaaaaaacccccccccccccccccccccccccccaaaaaaccccccccccccfffllkkkkkkkdddddddcaaaaaacccc
+abaaaacccccccccccccccccccccccccccaaccccccccccccccccccccccccccccccaacaaacccccccccccccfeekkkkkkkddddddcccaaaccccccc
+abcaaacccccccccccaaaccccccccaacccaaccccaaaaaccccaaaccccccccccccccaaccccccccccccccccceeeeekkkkdddddccccccaaccccccc
+abccccccccccccccaaaaaaccccccaaacaaccacaaaaaaaccaaaaccccccccccaccaaccccccccccccccccccceeeeeeeedddacccccccccccccccc
+abccccccccccccccaaaaaacccccccaaaaacaaaaaccaaaaaaaacccccccccccaaaaacccccccccccccccccccceeeeeeedaaacccccccccccccaaa
+abccccccaaacccccaaaaacccccccaaaaaacaaaaaaaaaaaaaaaccccccccccccaaaaaccccccccccccccccccccceeeeecaaacccccccccccccaaa
+abccccccaaaccccccaaaaacccccaaaaaaaaccaaaaacaaaaaaccccccccccccaaaaaacccccccccccccccccccccaaaccccaccccccccccccccaaa
+abccccaacaaaaacccaaaaacccccaaaaaaaacaaaaaaaaaaaaaaaccccaaaaccaaaacccccccccccccccccccccccaccccccccccccccccccaaaaaa
+abccccaaaaaaaaccccccccccccccccaaccccaacaaaaaaaaaaaaaaccaaaaccccaaacccccccccccccccccccccccccccccccccccccccccaaaaaa
diff --git a/i13.txt b/i13.txt
new file mode 100644
index 0000000..81a9c5a
--- /dev/null
+++ b/i13.txt
@@ -0,0 +1,450 @@
+[[],[[[]],9,[],1],[1,0]]
+[[[10,8,0,[4,3],[1,4]],4,[7,5,[9,10,7,10],8]],[8,[[1,5,9,1],6,[10,5],5,[7,1]]],[[0,7,3],[[5],[8,3,0],4]],[4,2]]
+
+[[8,6,[[9,0,0],2,[6,3,2,0]],[],6],[10,[10,10,8,2],[[4,3,7],4,8],1,7]]
+[[[],0,[[8,8,10,5,7],1,5,0],[]]]
+
+[[[],6]]
+[[9,[],3,[9]],[],[[1],[10,9,4,[]],[2]],[]]
+
+[[10,3],[3,1,[3],8,5],[],[6,2,7,[10],[[0,8,9,10],5]]]
+[[4],[0,1,[10]],[],[],[0,[[3],[7,7],8,[9,0,0],3],3,8]]
+
+[[9,[],[[7,8,10],1,[7,6,9],[7,5,0],8]],[[3,[],[4,8],[]]],[10,[9,0,7,9],[[0,8,8],[],[6],[4,6],[8,7,0,9]],[10,[],8,[],5]],[[[7,10],[5,10],[4,0,8,3,9],[]],[2]]]
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+[[[7,4,[9],[2,10,8]],[7,[3,2,6,8,9],8,[2]]],[[2,[10],7,[7,0,2,9]],[[],[4,2,4,4,10],[0,2,3],[]],0,[[9,6,0,8,9],5],[9,[],[2,2,3,10],[8,0,3,6]]],[2]]
+
+[[],[[],10],[3,1,[[]],[[9],[],2,[3]],[0,[4,10,9,0,6],[7,7,10,2,2]]]]
+[[7,6,4,8,[]],[[],[[10,0,10,1,9],7,7],[[0,1,5,6]]],[2],[6,[5,5],1,9,[]]]
+
+[[[]],[[10,10],5,[],10],[7],[1,[[],4,[],2],9],[3,0]]
+[[[7],2],[5,[5,[10,7,6,1,10],[10,0,3]],[[5,4],4,[10,8,8,4,9],3],[[4,5,5],[6,6,6]]],[4,[],5]]
+
diff --git a/lib.py b/lib.py
new file mode 100644
index 0000000..6e4715b
--- /dev/null
+++ b/lib.py
@@ -0,0 +1,18 @@
+import re
+
+def str_to_single_int(line: str) -> int:
+    line = line.replace(" ", "")
+    r = re.compile(r"\d+")
+    for m in r.findall(line):
+        return int(m)
+    raise Exception("No single digit sequence in '{line}'")
+
+def str_to_int_list(line: str) -> list[int]:
+    r = re.compile(r"\d+")
+    return list(map(int, r.findall(line)))
+
+def str_to_lines_no_empty(text: str) -> list[str]:
+    return list(filter(lambda l: l.strip() != "", text.splitlines()))
+
+def str_to_lines(text: str) -> list[str]:
+    return list(text.splitlines())