// #define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); ++i)
int main() {
    // Input And Output
    int N;
    cin >> N;
    while (!cin.eof()) {
        string S;
        cin >> S;
        cout << S;
    }
    cout << endl;
}