#define _CRT_SECURE_NO_WARNINGS
//#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> pii;
#define all(c) (c).begin(), (c).end()
#define loop(i,a,b) for(ll i=a; i<ll(b); i++)
#define rep(i,b) loop(i,0,b)
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define mt make_tuple
template<class T> istream & operator>>(istream & is, vector<T> &);
template<class T> ostream & operator<<(ostream & os, vector<T> const &);
template<int n, class...T> typename enable_if<(n>=sizeof...(T))>::type _ot(ostream &, tuple<T...> const &){}
template<int n, class...T> typename enable_if<(n< sizeof...(T))>::type _ot(ostream & os, tuple<T...> const & t){ os << (n==0?"":" ") << get<n>(t); _ot<n+1>(os, t); }
template<class...T> ostream & operator<<(ostream & os, tuple<T...> const & t){ _ot<0>(os, t); return os; }
template<int n, class...T> typename enable_if<(n>=sizeof...(T))>::type _it(istream &, tuple<T...> &){}
template<int n, class...T> typename enable_if<(n< sizeof...(T))>::type _it(istream & is, tuple<T...> & t){ is >> get<n>(t); _it<n+1>(is, t); }
template<class...T> istream & operator>>(istream & is, tuple<T...> & t){ _it<0>(is, t); return is; }
template<class T, class U> istream & operator<<(istream & is, pair<T,U> & p){ return is >> p.first >> p.second; }
template<class T, class U> ostream & operator<<(ostream & os, pair<T,U> const & p){ return os << "(" << p.first << ", " << p.second << ") "; }
template<class T> istream & operator>>(istream & is, vector<T> & v){ rep(i,v.size()) is >> v[i]; return is; }
template<class T> ostream & operator<<(ostream & os, vector<T> const & v){ rep(i,v.size()) os << v[i] << (i+1==(int)v.size()?"":" "); return os; }
#ifdef DEBUG
#define dump(...) (cerr<<#__VA_ARGS__<<" = "<<mt(__VA_ARGS__)<<" ["<<__LINE__<<"]"<<endl)
#else
#define dump(...)
#endif

int main(){
    int a1,a2,b1,b2,c1,c2;
    while(cin>>a1>>a2>>b1>>b2>>c1>>c2){
        rep(i,c1){
            if(a2){
                a2--;
                b2++;
            } else {
                a1--;
                b1++;
            }
        }
        dump(a1,a2);
        dump(b1,b2);
        rep(i,c2){
            if(b1){
                b1--;
                a1++;
            } else {
                b2--;
                a2++;
            }
        }
        cout << a1 << endl;
    }
}