#include<iostream>
#include<string>
using namespace std;
#define FOR(i,num,N) for(int(i)=(num);(i)<(N);(i)++)

int main(){
    int N;
    cin>>N;
    int A[1000] = {0};

    FOR(i,0,N){
        string s;
        cin>>s;
        A[s.size()-2]++;
    }
    int a=0; int m=0;
    FOR(i,0,1000){
        if(m<=A[i]){
            m=A[i];
            a=i;
        }
    }
    cout<<a<<"\n";
}