using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace YukiCoder
{
    class Program
    {
        static void Main(string[] args)
        {
            int nn = int.Parse(Console.ReadLine());
            string S = "";
            for (int i = 0; i < nn; i++)
            {
                S += Console.ReadLine();
            }
            Console.WriteLine(S);
            Console.ReadLine();
        }
    }
}