#include <bits/stdc++.h>
using namespace std;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int aw,ab,bw,bb; cin >> aw >> ab >> bw >> bb;
    int C,D; cin >> C >> D;
    int move = min(ab,C);
    bb += move,ab -= move,C -= move;
    bw += C,aw -= C;
    
    move = min(bw,D);
    aw += move;
    cout << aw << endl;
}