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

namespace yukicore
{
     class Program
    {
        private static void Main()
        {
            //no597
          StringBuilder sb=new StringBuilder();
            Console.ReadLine();
            while (true)
            {
                var str = Console.ReadLine();
                if (string.IsNullOrEmpty(str))
                    break;
                sb.Append(str);
            }
            Console.WriteLine(sb.ToString());
        }
    }
}