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# e(x) = 3x + 3 mod 26          d(x) = 9(x-3) mod 26
if __name__ == '__main__':
        string = 'NPVGP GIZGH LGZKP LKKLF EQZUN PGEHZ RKZOJ ZGZXZ MZQKA'
        output = ""
        for c in string:
                if c != ' ':
                        char = ord(c) - 64
                        output += (chr((3 * char - 21) % 26 + 64))
                else:
                        output += ' '
        print output