#!/usr/bin/python2
import binascii
import sys
import string

for line in sys.stdin:
    for pos, eachChar in enumerate(line, 1):
        if pos % 4 == 0:
            if eachChar in string.ascii_letters:
                sys.stdout.write(binascii.unhexlify(hex(int(binascii.hexlify(eachChar), 16) & 119)[2:]))
            else:
                sys.stdout.write(eachChar)
        else:
            sys.stdout.write(eachChar)
        sys.stdout.flush()
sys.stdout.write('\n')