mod = 998244353


def main():
    import sys
    input = sys.stdin.readline

    N = int(input())
    S = input().rstrip('\n')

    T = []
    for s in S:
        T.append(chr(97 + 25 - (ord(s) - 97)))
    print("".join(T))
    

if __name__ == '__main__':
    main()