SubstringWithReplace()

using System;
using System.Text;

namespace Substring
{
    class MainClass
    {
        public static void Main(string[] args)
        {
          string wordToRemove = Console.ReadLine().ToLower();
          string text = Console.ReadLine();
            while (text.Contains(wordToRemove))
            {
              text = text.Replace(wordToRemove, string.Empty);
            }

          Console.WriteLine(text);
        }
    }
}