using System;

public class Program

{

    public static void Main()

    {

        var inputString = "szmit pedale jebali cie w kanale";

        char[] array = inputString.ToCharArray();

        Array.Reverse(array);

        var outputString = "";

        foreach(var letter in array)

        {

            if(letter == 'u')

            {

                outputString += ":rr" + letter + ":";

            }

            else if(letter != ' ')

            {

                outputString += ":r" + letter + ":";

            }           

            else

            {

                outputString +="  ";

            }

        }

        Console.Write(outputString);

    }

}