#include<iostream>
#include<string>
#include<algorithm>
#include<functional>
#include<vector>
#include<set>
#include<queue>
#include<list>
#include<stdio.h>
#include<stdlib.h>
#include<map>

#define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)
#define fore(i,a) for(auto &i:a)
#define all(x) (x).begin(),(x).end()

using namespace std;

int main() {
	
	int n;
	cin >> n;

	int tb[1001] = {};

	for (int i = 0; i < n; i++) {
		string buf;
		cin >> buf;

		++tb[buf.length() - 2];
	}


	int max = -1;
	int index = -1;
	for (int i = 0; i < 1001; i++) {
		
		if (max <= tb[i]) {
			max = tb[i];
			index = i;
		}
	}

	cout << index << endl;
	
}