using System;

class MagicLetter
{
    static void Main()
    {
        char first = char.Parse(Console.ReadLine().ToLower());
        char second = char.Parse(Console.ReadLine().ToLower());
        char third = char.Parse(Console.ReadLine().ToLower());

        for (char p1 = first; p1 <= second; p1++)
        {
            for (char p2 = first; p2 <= second; p2++)
            {
                for (char p3 = first; p3 <= second; p3++)
                {
                    if (p1 == third)
                    {
                        p1++;
                    }
                    else if (p2 == third)
                    {
                        p2++;
                    }
                    else if (p3 == third)
                    {
                        p3++;
                    }
                    Console.Write($"{p1}{p2}{p3} ");
                }
            }
        }
        Console.WriteLine();
    }
}