# -*- coding:utf-8 -*-

if __name__ == "__main__":
	s1, p1, x1 = raw_input().split()
	s2, p2, x2 = raw_input().split()
	p1 = int(p1)
	p2 = int(p2)
	if p1 > p2:
		print s1
	elif p1 < p2:
		print s2
	else:
		print -1