Problem 06. Letters Combinations

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Remoting.Channels;

namespace ConsoleApplication
{
    internal class Program
    {
        public static void Main(string[] args)
        {
            char first = char.Parse(Console.ReadLine());
            char second = char.Parse(Console.ReadLine());
            char third = char.Parse(Console.ReadLine());

            int cpunter = 0;
            string print = "";

            for (var x = first; x <= (int) second; x++)
            {
                for (var y = first; y <= (int) second; y++)
                {
                    for (var z = first; z <= (int) second; z++)
                    {
                        print = x.ToString() + y + z;

                        if (print.Contains(third) == false)
                        {
                            cpunter++;
                            Console.Write(print+" ");
                        }
                    }
                }
            }
            Console.Write("{0}",cpunter);
        }
    }
}