import binascii
import collections


scores = {
    'a': 8.167,
    'b': 1.492,
    'c': 2.782,
    'd': 4.253,
    'e': 12.702,
    'f': 2.228,
    'g': 2.015,
    'h': 6.094,
    'i': 6.966,
    'j': 0.153,
    'k': 0.772,
    'l': 4.025,
    'm': 2.406,
    'n': 6.749,
    'o': 7.507,
    'p': 1.929,
    'q': 0.095,
    'r': 5.987,
    's': 6.327,
    't': 9.056,
    'u': 2.758,
    'v': 0.978,
    'w': 2.360,
    'x': 0.150,
    'y': 1.974,
    'z': 0.074,
    ' ': 19
}

def score(tmp):
    res = 0.0
    for i in tmp:
        chari = chr(i).lower()
        if chari in scores:
            res += scores[chari]
    return res


def singleByteXorCipher(str1):
    tmp1 = binascii.unhexlify(str1)
    tmp2 = bytearray(len(tmp1))
    maxsc = 0
    maxind = 0
    max = tmp1
    for x in range(0, 256):
        for y in range(len(tmp1)):
            tmp2[y] = tmp1[y] ^ x
        sc = score(tmp2)
        if sc>maxsc:
            maxsc= sc
            max = tmp2
    print (binascii.hexlify(max).decode('ascii'))



if __name__ == '__main__':
    str1 = input().strip()
    singleByteXorCipher(str1)