using System;
using System.Collections.Generic;
using static System.Console;

namespace Cubic_Numbers_Challenge
{
    internal class Program
    {
        public static void Main(string[] args)
        {
            // first, we ask the user for a number
            // then, we send the input to the IsCubic method
            WriteLine("Please enter a number");
            var number = ReadLine();
            IsCubic(number);
        }

        private static void IsCubic(string input)
        {
            // first we see each character individually
           var characters = new List<char>();
           foreach (var character in input)
           {
               characters.Add(character);
           }

           // we evaluate the cubic value of each character
           var results = new int[characters.Count];

           for (int i = 0; i < results.Length; i++)
           {
               var value = int.Parse(characters[i].ToString());
               var powerValue = (int) Math.Pow(value, 3); // value to the third power
               results[i] = powerValue;
           }

           // now we compare the sum of all results to the entered value and determine if it is cubic or not
           int sum = 0;
           foreach (int number in results)
           {
               sum += number;
           }

           var enteredValue = int.Parse(input);

           if (enteredValue == sum)
           {
               WriteLine("Lucky");
           }
           else
           {
               WriteLine("Unlucky");
           }
        }
    }
}