using System.Numerics;

public class Program
{
    public static void Main()
    {

        //int num = int.Parse(Console.ReadLine() ?? string.Empty);
        string[] str = (Console.ReadLine() ?? string.Empty).Trim().Split(' ');
        //string str = Console.ReadLine() ?? string.Empty;



        int a = int.Parse(str[0]);
        int b = int.Parse(str[1]);

        if (a == 0 && b == 8 || a == 8 && b == 0)
        {
            Console.WriteLine(4);
            return;
        }

        if (a > b)
        {
            if (a - b == 8)
            {
                Console.WriteLine(b + 4);
                return;
            }
            a += 4;
            if (a > 11)
            {
                Console.WriteLine(a - 12);
            }
            else
            {
                Console.WriteLine(a);
            }
        }
        else
        {
            if (b - a == 8)
            {
                Console.WriteLine(a + 4);
                return;
            }
            b += 4;
            if (b > 11)
            {
                Console.WriteLine(b - 12);
            }
            else
            {
                Console.WriteLine(b);
            }
        }


    }
}