659 B | 659 chars
import sys
from math import sqrt, pi, sin, factorial, ceil, floor
BLANK = " "
inp = input
# inp = lambda : sys.stdin.readline()[:-1].strip()
mii = lambda x = BLANK : [*map(int,inp().split(x))]
mfi = lambda x = BLANK : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def solve():
while 1:
l = mii()
if sum(l) == 0:
break
k = sum(l) % 25 + 1
s = input()
for i in s:
if 'a' <= i <= 'z':
p(end=chr((ord(i) - 97 - k + 26) % 26 + 97))
else:
p(end=i)
p()
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()