using System;
using System.Text;

namespace _03._Characters_in_Range
{
    public class Program
    {
        public static void Main()
        {
            char firstCharacter = char.Parse(Console.ReadLine());
            char secondCharacter = char.Parse(Console.ReadLine());
            Console.WriteLine(Between(firstCharacter, secondCharacter));
        }

        public static string Between(char firstCharacter, char secondCharacter)
        {
            string currentChar = string.Empty;
            int one = (int) firstCharacter;
            int second = (int) secondCharacter;
            for (int i = one + 1; i < second; i++)
            {
                firstCharacter = Convert.ToChar(i);
                currentChar += firstCharacter + " ";
            }
            return currentChar;
        }
    }
}