lst = list(input())
Chr = [chr(i) for i in range(65, 65+26)]
for i in range(len(lst)):
	n = Chr.index(lst[i])
	lst[i] = Chr[(n-i-1)%26] 
ans = []
for i in range(len(lst)):
	ans.append(lst[i])
print("".join(ans))