# coding: utf-8

import string

s = str(input())
s_i = 0
A =string.ascii_uppercase
array_A = [i for i in A]
num = [int(i+1) for i in range(len(array_A))]
ans = []
for j in range(len(s)):
    s_i += 1
    a_i = array_A.index(s[j])
    if s_i == len(array_A):
        s_i = 0
        ans.append(array_A[a_i-s_i])
    else:
        ans.append(array_A[a_i-s_i])

for a in ans:
    print(*a , end="")