#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include <map>
#include <vector>
#include <queue>
#include <deque>
#include <set>
#include <stack>
#include <algorithm>
#include <array>
#include <unordered_set>
#include <unordered_map>
#include <string>
using namespace std;

bool rcmp(int a, int b) { return a>b; }
typedef long long LL;



int main() {
    int n, i, r, v, a1, a2, a3, b;
    scanf("%d %d %d %d", &a1, &a2, &a3, &b);
    r = a3*3;
    v = a1+a2+a3+b;
    printf("%d\n", max(r, v));
    return 0;
}