#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main() {
    int n;
    cin >> n;
    int cnt[1000] {};
    int mx = 0;
    int ans;
    for (int i = 0; i < n; i++) {
        string s;
        cin >> s;
        int eyes = s.size() - 2;
        cnt[eyes]++;
        if (cnt[eyes] > mx) {
            mx = cnt[eyes];
            ans = eyes;
        } else if (cnt[eyes] == mx && eyes > ans) {
            ans = eyes;
        }
    }
    cout << ans << endl;
    return 0;
}