#include <bits/stdc++.h>
#define REP(i,n,N) for(int i=n;i<N;i++)
#define p(s) cout<<(s)<<endl
using namespace std;

int N;
string s;
int main(void){
    cin>>N;
    REP(i,0,N){
        cin>>s;
        cout<<s;
    }
    p("");
    return 0;
}