Class Task 55#

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

namespace ConsoleApplication1
{
    class Program
    {
        static string Replace(string text, string st1, string st2)
        {
            int x, y;
            x = text.IndexOf(st1);
            y = text.IndexOf(st2);
            if (x > y)
            {
                text = text.Replace(st2, st1);
            }
            else
                text = text.Replace(st1, st2);
            return text;
        }
        static void Main(string[] args)
        {
            string text = Console.ReadLine();
            string word = Console.ReadLine();
            string word2 = Console.ReadLine();
            Console.WriteLine(Replace(text, word, word2));
            Console.ReadLine();
        }
    }
}