using System;
class Program
{
    static void Main()
    {
        long firstNumber = long.Parse(Console.ReadLine());
        long SecoundNnumber = long.Parse(Console.ReadLine());

        long sum = 0;

        if (0 <= firstNumber && firstNumber <= 127 && 128 <= SecoundNnumber && SecoundNnumber <= 2147483647)
        {
            sum = firstNumber * 4 + SecoundNnumber * 10;
            Console.WriteLine(sum);

        }
        else if (0 <= SecoundNnumber && SecoundNnumber <= 127 && 128 <= firstNumber && firstNumber <= 2147483647)
        {
            sum = SecoundNnumber * 4 + firstNumber * 10;
            Console.WriteLine(sum);
        }
    }
}