#include<iostream>
#include<string>
using namespace std;

int main()
{
    int sum[1001];
    for(int i=0;i<1001;i++){
        sum[i] = 0;
    }
    int num;
    cin>>num;
    string str;
    for(int i=0;i<=num;i++){
        cin>>str;
        sum[str.length()-2] ++;
    }
    int max = 0;
    int max_num = 0;
    for(int i=0;i<1001;i++){
        if(max <= sum[i]){
            max = sum[i];
            max_num = i;
        }
    }
    cout<<max_num;
    return 0;
}