#include<iostream>
#include<string>
#include<vector>
#include<algorithm>

using namespace std;

int main() {

	int n;
	vector<int> array;
	cin >> n;
	array.resize(1001,0);

	string str;
	int count=0;
	for (int i = 0;i < n;i++) {
		count = 0;
		cin >> str;
		for (int j = 0;j < str.size();j++) {
			if (str[j] == '^')count++;
		}
		array[count]++;
	}
	
	int maxa = 0;
	for (int i = 1;i <= array.size() - 2;i++) {
		if (array[i+1]!=0 && array[i] <= array[i + 1]) {
			if (array[maxa]<=array[i+1]) {
				maxa = i + 1;
			}
		}
	}

	cout << maxa << endl;

	return 0;
}