n = int(input())
c = {}
for i in range(n):
	x = input().count('^')
	if not x in c:
		c[x] = 1
	else:
		c[x] += 1
num = max(c.values())

l = []
for i in c:
	if c[i] == num:
		l.append(i)
print(max(l))