#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
#define yn {puts("Yes");}else{puts("No");}
#define MAX_N 200005

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

    int a[1200] = {};

    int cnt = 0;

    rep(i,n){
        string s;
        cin >> s;
        a[s.size() - 2]++;
        cnt = max(cnt, a[s.size() - 2]);
    }

    drep(i,1200){
        if(a[i] == cnt){
            cout << i << endl;
            break;
        }
    }
    return 0;
}