#!/usr/bin/env python3

import collections


def most_common_number(ss):
    ctr = collections.Counter(s.count("^") for s in ss)
    return max(k for k, v in ctr.items() if v == ctr.most_common(1)[0][1])


def main():
    n = int(input())
    ss = [input() for _ in range(n)]
    print(most_common_number(ss))


if __name__ == '__main__':
    main()