using System;

namespace ConsoleApp2
{
    public class Text
    {
        public void Testing(string str)
        {
            int res;
            for (int i = 0; i < str.Length; i++)
            {
                if (Int32.TryParse(str[i].ToString(), out res))
                {
                    int number = Convert.ToInt32(str[i].ToString());
                    for (int j = 1; j < number; j++)
                    {
                        Console.Write(str[i - 1]);
                    }
                }
                else
                {
                    Console.Write(str[i]);
                }
            }
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            string str = Console.ReadLine();
            Text txt = new Text();
            txt.Testing(str);
            Console.ReadKey();
        }
    }
}