static void Main(string[] args)
        {
            char first = char.Parse(Console.ReadLine());
            char second = char.Parse(Console.ReadLine());
            char third = char.Parse(Console.ReadLine());
            int couter = 0;
 
            for (int symbol1 = 97; symbol1 <=second; symbol1++)
            {
                if (symbol1 == third)
                {
                    continue;
                }
                for (int symbol2 = 97; symbol2 <=second; symbol2++)
                {
                    if (symbol2 == third)
                    {
                        continue;
                    }
                    for (int symbol3 = 97; symbol3 <= second; symbol3++)
                    {
                        if (symbol3 == third)
                        {
                            continue;
                        }
                        couter++;
                        Console.Write($"{(char)symbol1}{(char)symbol2}{(char)symbol3} ");
                       
                    }
                }
            }

            Console.WriteLine(couter);
        }