#include <bits/stdc++.h>
#define int long long
using namespace std;

signed main(){
    int n;
    cin >> n;
    map<int, int> mp;
    for(int i = 0; i < n; i++){
        string s;
        cin >> s;
        mp[s.size() - 2]++;
    }
    int MAX = 0, ans = 0;
    for(auto it = mp.begin(); it != mp.end(); it++){
        if(it -> second >= MAX){
            MAX = it -> second;
            ans = it -> first;
        }
    }
    cout << ans << endl;
}