using static System.Math;
using System.Collections.Generic;
using System.Linq;
using System;

public class Hello
{
    static void Main()
    {
        var a = new int[3];
        string[] line = Console.ReadLine().Trim().Split(' ');
        a[0] = int.Parse(line[0]);
        a[1] = int.Parse(line[1]);
        a[2] = int.Parse(line[2]);
        var b = int.Parse(line[3]);
        Console.WriteLine(Max(a[2] * 3, a.Sum() + b));
    }
}