2016_18_Dec_Letters Combinations

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

namespace LettersCombination
{
    class Program
    {
        static void Main(string[] args)
        {
            var start = char.Parse(Console.ReadLine());
            var end = Console.ReadLine()[0];
            var ignorChar = char.Parse(Console.ReadLine());

            var combinations = 0;

            for (int i = start; i <= end; i++)  //отпечатваме 1-вата буква
            {
                for (int j = start; j <= end; j++) // отпечатваме 2-та буква
                {
                    for (int k = start; k <= end; k++) //  за 3-тата буква
                    {
                        if (i != ignorChar && j != ignorChar && k != ignorChar)
                        {
                            Console.Write("{0}{1}{2} ", (char)i, (char)j, (char)k);

                            combinations++;
                        }
                    }
                }
            }
            Console.WriteLine(combinations);
        }
    }
}