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 one = int.Parse(str[0]);
        int two = int.Parse(str[1]);
        int three = int.Parse(str[2]);
        int b = int.Parse(str[3]);

        int r = one + two + three + b;
        int m = three * 3;

        if(r > m)
        {
            Console.WriteLine(r);
        }
        else
        {
            Console.WriteLine(m);
        }

    }

}