using System;

public class Program

{

    public static void Main()

    {

        char a=Convert.ToChar(Console.ReadLine());

        char b=Convert.ToChar(Console.ReadLine());

        int c=b-a;

        if(Char.IsDigit(Convert.ToChar(c)))

            Console.WriteLine("Lucky Character");

        else

            Console.WriteLine("Unlucky Character");

        Console.WriteLine(c);

    }

}