#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;
using ll = long long;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    char s[1001];
    int p[1001] = {};

    int n;
    cin >> n;

    for (int i = 0; i < n; i++) {
        cin >> s;
        p[strlen(s) - 2]++;
    }

    int m = 0, r;
    for (int i = 1000; i >= 0; i--) {
        if (p[i] > m) {
            m = p[i];
            r = i;
        }
    }

    cout << r << endl;

    return 0;
}