from lib import *
import hashlib

second = True
data = open(0).read().strip()

if second:
    p = [" " for _ in range(8)]
    for i in range(10**12):
        s = data + str(i)
        h = hashlib.md5(s.encode()).hexdigest()
        if h.startswith("0" * 5) and h[5] in "01234567":
            index = int(h[5])
            if p[index] == " ":
                p[index] = h[6]
                # print("\r" + "".join(p))
        if not " " in p:
            p = "".join(p)
            break
else:
    p = ""
    for i in range(10**12):
        s = data + str(i)
        h = hashlib.md5(s.encode()).hexdigest()
        if h.startswith("0" * 5):
            p += h[5]
        if len(p) == 8:
            break

print(p)