n = int(input())
dic = {}
for i in range(n):
	s = input().strip()
	if not s.count in dic.keys():
		dic[s.count('^')] = 1
	else:
		dic[s.count('^')] += 1
keys = [k for k, v in dic.items() if v == max(dic.values())]
print(max(keys))