from collections import defaultdict
n = int(input())
dd = defaultdict(int)
ans = -1
max_cnt = 0
for _ in range(n):
    s = input()
    cnt = s.count("^")
    dd[cnt] += 1
    if (max_cnt < dd[cnt]) or (max_cnt == dd[cnt] and ans < cnt):
        max_cnt = dd[cnt]
        ans = cnt

print(ans)