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

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