using System;
using System.IO;
using System.Linq;

namespace yukicore
{
     class Program
    {
        private static void Main()
        {
            //no597
            string rtn = "";
            Console.ReadLine();
            while (true)
            {
                string str = Console.ReadLine();
                if(string.IsNullOrEmpty(str))
                    break;
                rtn += str;
            }
            Console.WriteLine(rtn);
        }
    }
}