#!/usr/bin/python3
# -*- coding: utf-8 -*-
# tr_01.py
import random

def nAleatoriEntreUnVentall(nPrimer, nDarrer):
	return random.randrange(nPrimer,nDarrer+1)
	
def n1x2():
	return nAleatoriEntreUnVentall(0,2)

def c1x2():
	cRet = '?'
	nAleat = nAleatoriEntreUnVentall(0,2)
	if nAleat == 0:
		cRet = '1'
	elif nAleat == 1:
		cRet = 'X'
	else:
		cRet = '2'
		
	return cRet

def main():
	for i in range(15):
		print("%c" % c1x2() )

main()