Python :

def fanma(c):
    if  c.isalpha():
        if c.isupper():
            n=ord(c)-ord('A')
            return chr(ord('Z')-n)
        else:
            n=ord(c)-ord('a')
            return chr(ord('z')-n)
    else:
        return c
str1=input().strip()
for item in str1:
    print(fanma(item),end="")