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

namespace yukicoderTest
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] input = Console.ReadLine().Split(' ');
            if(input[1]=="2")
            {
                Console.WriteLine("4");
            }
            else
            {
                Console.WriteLine("14");
            }

        }
    }
}