diff --git a/python/e022.py b/python/e022.py
index 601ff17..5b4e035 100644
--- a/python/e022.py
+++ b/python/e022.py
@@ -3,7 +3,7 @@ def get_score_for_name(name):
 
 
 def euler_022():
-    with open('../txt/EulerProblem022.txt', 'r') as f:
+    with open('../txt/e022.txt', 'r') as f:
         names = f.read().split(',')
         names.sort()
         s = sum([(i + 1) * get_score_for_name(name)
@@ -15,3 +15,4 @@ if __name__ == "__main__":
     assert(get_score_for_name('COLIN') == 53)
     assert(euler_022() == 871198282)
     print("e022.py: {}".format(euler_022()))
+
diff --git a/python/e042.py b/python/e042.py
index bdee8da..542362b 100644
--- a/python/e042.py
+++ b/python/e042.py
@@ -1,5 +1,5 @@
 def get_words():
-    with open("../txt/EulerProblem042.txt", "r") as f:
+    with open("../txt/e042.txt", "r") as f:
         s = f.read()
     words = [w.strip('"') for w in s.split(",")]
     return words
diff --git a/python/e054.py b/python/e054.py
index d7a3c2e..1f1750c 100644
--- a/python/e054.py
+++ b/python/e054.py
@@ -110,7 +110,7 @@ def read_hands():
         in the tuple represents a hand.
     """
     hands = []
-    with open("../txt/EulerProblem054.txt", "r") as f:
+    with open("../txt/e054.txt", "r") as f:
         for line in f.readlines():
             cards = line.strip().split(" ")
             hands.append((cards[:5], cards[5:]))
diff --git a/python/e059.py b/python/e059.py
index a6ec244..179376b 100644
--- a/python/e059.py
+++ b/python/e059.py
@@ -1,12 +1,12 @@
 
 def get_encrypted_msg():
-    with open("../txt/EulerProblem059.txt", "r") as f:
+    with open("../txt/e059.txt", "r") as f:
         msg = [int(d) for d in f.read().split(',')]
         return msg
 
 
 def get_words():
-    with open("../txt/EulerProblem042.txt", "r") as f:
+    with open("../txt/e042.txt", "r") as f:
         words = [w.strip('"') for w in f.read().split(",")]
         return set(words)
 
diff --git a/python/e067.py b/python/e067.py
index 29f376b..622685d 100644
--- a/python/e067.py
+++ b/python/e067.py
@@ -2,7 +2,7 @@ from e018 import find_greatest_path_sum_in_triangle_string
 
 
 def euler_067():
-    with open("../txt/EulerProblem067.txt") as f:
+    with open("../txt/e067.txt") as f:
         return find_greatest_path_sum_in_triangle_string(f.read())
 
 
diff --git a/python/e079.py b/python/e079.py
index 8319363..3cfbd0b 100644
--- a/python/e079.py
+++ b/python/e079.py
@@ -72,7 +72,7 @@ def add_single_digit(code, digit):
 
 def euler_079():
     tests()
-    with open("../txt/EulerProblem079.txt", "r") as f:
+    with open("../txt/e079.txt", "r") as f:
         passcodes = sorted(list(set([line.strip() for line in f])))
 
     codes = [""]
diff --git a/python/e081.py b/python/e081.py
index e8502d6..19dffb8 100644
--- a/python/e081.py
+++ b/python/e081.py
@@ -3,7 +3,7 @@ from lib_a_star import A_Star
 
 
 def get_grid():
-    with open("../txt/EulerProblem081.txt", "r") as f:
+    with open("../txt/e081.txt", "r") as f:
         grid = list(map(lambda line: list(map(int, line.split(","))),
                         f.readlines()))
         return grid
diff --git a/python/e089.py b/python/e089.py
index 0565a3c..50c21fc 100644
--- a/python/e089.py
+++ b/python/e089.py
@@ -63,7 +63,7 @@ def save_characters(numeral):
 def euler_089():
     tests()
 
-    with open("../txt/EulerProblem089.txt") as f:
+    with open("../txt/e089.txt") as f:
         numerals = map(lambda l: l.strip(), f.readlines())
     return sum(map(save_characters, numerals))
 
diff --git a/python/e099.py b/python/e099.py
index c8ceb48..30effd2 100644
--- a/python/e099.py
+++ b/python/e099.py
@@ -6,7 +6,7 @@ def exp_log(base, power):
 
 
 def read_exps():
-    with open("../txt/EulerProblem099.txt", "r") as f:
+    with open("../txt/e099.txt", "r") as f:
         return [(exp_log(int(s[0]), int(s[1])), i + 1)
                 for i, line in enumerate(f.readlines())
                 if (s := line.split(","))]
diff --git a/txt/EulerProblem022.txt b/txt/e022.txt
similarity index 100%
rename from txt/EulerProblem022.txt
rename to txt/e022.txt
diff --git a/txt/EulerProblem042.txt b/txt/e042.txt
similarity index 100%
rename from txt/EulerProblem042.txt
rename to txt/e042.txt
diff --git a/txt/EulerProblem054.txt b/txt/e054.txt
similarity index 100%
rename from txt/EulerProblem054.txt
rename to txt/e054.txt
diff --git a/txt/EulerProblem059.txt b/txt/e059.txt
similarity index 100%
rename from txt/EulerProblem059.txt
rename to txt/e059.txt
diff --git a/txt/EulerProblem067.txt b/txt/e067.txt
similarity index 100%
rename from txt/EulerProblem067.txt
rename to txt/e067.txt
diff --git a/txt/EulerProblem079.txt b/txt/e079.txt
similarity index 100%
rename from txt/EulerProblem079.txt
rename to txt/e079.txt
diff --git a/txt/EulerProblem081.txt b/txt/e081.txt
similarity index 100%
rename from txt/EulerProblem081.txt
rename to txt/e081.txt
diff --git a/txt/EulerProblem082.txt b/txt/e082.txt
similarity index 100%
rename from txt/EulerProblem082.txt
rename to txt/e082.txt
diff --git a/txt/EulerProblem083.txt b/txt/e083.txt
similarity index 100%
rename from txt/EulerProblem083.txt
rename to txt/e083.txt
diff --git a/txt/EulerProblem089.txt b/txt/e089.txt
similarity index 100%
rename from txt/EulerProblem089.txt
rename to txt/e089.txt
diff --git a/txt/EulerProblem096.txt b/txt/e096.txt
similarity index 100%
rename from txt/EulerProblem096.txt
rename to txt/e096.txt
diff --git a/txt/EulerProblem099.txt b/txt/e099.txt
similarity index 100%
rename from txt/EulerProblem099.txt
rename to txt/e099.txt