using System;

namespace _14.MagicLetter
{
    class Program
    {
        static void Main(string[] args)
        {
            //Write a program, which prints all 3-letter combinations, using only the letters from a given interval.
            //You will also receive a third letter. Every combination, which contains this letter should not be printed.

            //Examples:
            //input : a c b
            //output: aaa aac aca acc caa cac cca ccc


            char letter1 = char.Parse(Console.ReadLine());
            char letter2 = char.Parse(Console.ReadLine());
            //letter3 is the letter which shouldn't be printed if the sequence contains it.
            char letter3 = char.Parse(Console.ReadLine());

            //letter3 to string, so I can use the .contains method at the end.
            string forbiddenLetter = letter3.ToString();


            for (char i = letter1; i <= letter2; i++)
            {
                for (char j = letter1; j <= letter2; j++)
                {
                    for (char l = letter1; l <= letter2; l++)
                    {
                        //the fore-mentioned sequence of letters to be printed.
                        string sequence = $"{i}{j}{l}";

                        if (sequence.Contains(forbiddenLetter))
                        {

                        }
                        else
                        {
                            Console.Write(sequence + " ");
                        }



                    }


                }
            }
        }


    }
}