700 B | 700 chars
import sys
from math import sqrt, pi, sin, factorial
inp = lambda : sys.stdin.readline()[:-1].strip()
mii = lambda x = " " : [*map(int,inp().split(x))]
mfi = lambda x = " " : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def solve():
while 1:
n = input()
if n == "0":
break
n = [*map(int, list(n))]
m = max(n)
idx = -1
for i in range(len(n)):
if n[i] == m:
idx = i
break
if n[idx] % 2:
n[idx] = 0
else:
n[idx] = (n[idx] + 4) % 10
p(int("".join([*map(str, n)])))
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
solve()