#include <iostream>
#include <set>
#include <vector>
#include <string>
#include <algorithm>
#include <iterator>

using namespace std;

#define rep(i, n) for(int i = 0; i < n; i++)
#define repi(i, n) for(auto i = (n).begin(); i != (n).end(); i++)
#define in_arr(type, a, n) copy_n(istream_iterator<type>(cin), n, (a).begin());

int main(){
    int n;
    cin >> n;
    vector<int> s(n);
    int max_ = 0;
    repi(i, s){
        string a;
        cin >> a;
        *i = a.size() - 2;
        max_ = max(max_, *i);
    }
    vector<int> num(max_ + 1, 0);
     repi(i, s){
         num[*i]++;
    }
     int ans = 0, count_ = 0;
     rep(i, num.size()){
         if(count_ <= num[i]){
             ans = i;
             count_ = num[i];
         }
     }
     cout << ans << endl;
    return 0;
}