def judge(name1, point1, name2, point2):
	if len(point1) > len(point2): return name1
	if len(point1) < len(point2): return name2
	for i in range(0, len(point1)):
		if int(point1[i]) > int(point2[i]): return name1
		if int(point1[i]) < int(point2[i]): return name2
	return '-1'

name1, point1, h = raw_input().split()
name2, point2, h = raw_input().split()
print judge(name1, point1, name2, point2)