import sys


def main():
    input = lambda: sys.stdin.readline()[:-1]
    N = int(input())
    S = input()

    ans = ""
    for s in S:
        n = 219 - ord(s)
        ans += chr(n)
    print(ans)


if not __debug__:
    f = open(sys.argv[1], "r")
    sys.stdin = f

main()