using System;

namespace _06.LettersCombinations
{
    class LettersCombinations
    {
        static void Main(string[] args)
        {
            char begin = char.Parse(Console.ReadLine());
            char end = char.Parse(Console.ReadLine());
            char exclude = char.Parse(Console.ReadLine());
            int count = 0;

            for (int firstLetter = begin; firstLetter <= end; firstLetter++)
            {
                if (firstLetter != exclude)
                {
                    for (int secondLetter = begin; secondLetter <= end; secondLetter++)
                    {
                        if (secondLetter != exclude)
                        {
                            for (int thirdLetter = begin; thirdLetter <= end; thirdLetter++)
                            {
                                if (thirdLetter != exclude)
                                {
                                    Console.Write($"{(char)firstLetter}{(char)secondLetter}{(char)thirdLetter} ");
                                    count++;
                                }

                            }
                        }

                    }
                }

            }
            Console.WriteLine(count);
        }
    }
}