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

namespace LettersCombinations
{
    class LettersCombinations
    {
        static void Main()
        {
            char n1 = Convert.ToChar(Console.ReadLine());   // Start letter
            char n2 = Convert.ToChar(Console.ReadLine());   // End letter
            char n3 = Convert.ToChar(Console.ReadLine());   // Letter to skip

            int start = 0;
            int end = 0;
            long counter = 0;

            char[] charArray = "abcdefghijklmnopqrstuvwxyz".ToCharArray();  // Assigning a-z array

            for (int i = 0; i < charArray.Length - 1; i++)                  // Loop for gathering index of the start/end letters
            {
                if (charArray[i] == n1)                                     // Gathering start letter index
                {
                    start = i;
                }
                if (charArray[i] == n2)                                     // Gathering end letter index
                {
                    end = i;
                }
                if (end != 0)                                               // Breaking the loop if end letter index is gathered
                {
                    break;
                }

            }



            for (int i = start; i <= end; i++)                              // Combinations printing loop 1
            {
                if (charArray[i] == n3)                                     // Skipping the combination containing n3
                {
                    continue;
                }
                for (int j = start; j <= end; j++)                          // Combinations printing loop 1.1
                {
                    if (charArray[j] == n3)                                 // Skipping the combination containing n3
                    {
                        continue;
                    }
                    for (int k = start; k <= end; k++)                      // Combinations printing loop 1.2
                    {
                        if (charArray[k] == n3)                             // Skipping the combination containing n3
                        {
                            continue;
                        }
                        Console.Write("{0}{1}{2} ", charArray[i], charArray[j], charArray[k]);
                        counter++;
                    }
                }
            }

            Console.Write(counter);
            Console.WriteLine();

        }
    }
}