S = list(input())
alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
for i in range(len(S)):
    for j in range(26):
        if S[i] == alphabet[j]:
            alphabet_num = j-i-1
            if j-i-1 >= 0:
                S[i] = alphabet[alphabet_num]
            else:
                cnt = 1
                while alphabet_num < 0:
                    alphabet_num = 26 * cnt + (j-i-1)
                    cnt += 1
                S[i] = alphabet[alphabet_num]
            print(S[i],end = "")
            break