#define _GLIBCXX_DEBUG #define ll long long #include <bits/stdc++.h> using namespace std; using Graph = vector<vector<int>>; int main(){ int AW, AB, BW, BB; cin >> AW >> AB >> BW >> BB; int C, D; cin >> C >> D; int ABB = min(C, AB), ABW = C - ABB; AW -= ABW, BW += ABW, BB += ABB; int BAW = min(D, BW); AW += BAW; cout << AW << endl; }