#include <bits/stdc++.h>
//#include <atcoder/all>
using namespace std;
//using namespace atcoder;
//using mint = modint1000000007;
//const int mod = 1000000007;
//using mint = modint998244353;
//const int mod = 998244353;
//const int INF = 1e9;
const long long LINF = 1e18;
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define rep2(i,l,r)for(int i=(l);i<(r);++i)
#define rrep(i, n) for (int i = (n-1); i >= 0; --i)
#define rrep2(i,l,r)for(int i=(r-1);i>=(l);--i)
#define all(x) (x).begin(),(x).end()
#define allR(x) (x).rbegin(),(x).rend()
#define endl "\n"
#define P pair<int,int>
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }
long long x, y, z, w;
bool chk(int _x, int _y, int _z, int _w) {
	return ((_x >= 0) && (_y >= 0) && (_z >= 0) && (_w >= 0));
}
long long calc(int _x, int _y, int _z, int _w) {
	return x * _x + y * _y + z * _z + w * _w;
}
long long fa(int a, int b, int c) {
	// caseA noUse:X
	int _x = 0;
	int _y = c - a;
	int _z = c - b;
	int _w = a + b - c;
	if (!chk(_x, _y, _z, _w)) return -LINF;
	return calc(_x, _y, _z, _w);
}
long long fb(int a, int b, int c) {
	// caseB noUse:Y
	int _x = a - c;
	int _y = 0;
	int _z = a - b;
	int _w = -a + b + c;
	if (!chk(_x, _y, _z, _w)) return -LINF;
	return calc(_x, _y, _z, _w);
}
long long fc(int a, int b, int c) {
	// caseC noUse:Z
	int _x = b - c;
	int _y = -a + b;
	int _z = 0;
	int _w = a - b + c;
	if (!chk(_x, _y, _z, _w)) return -LINF;
	return calc(_x, _y, _z, _w);
}
long long fd(int a, int b, int c) {
	if (0 != (a + b + c) % 2)return -LINF;
	// caseC noUse:W
	int _x = (a + b - c) / 2;
	int _y = (-a + b + c) / 2;
	int _z = (a - b + c) / 2;
	int _w = 0;
	if (!chk(_x, _y, _z, _w)) return -LINF;
	return calc(_x, _y, _z, _w);
}
long long fe(int a, int b, int c) {
	if (1 != (a + b + c) % 2)return -LINF;
	// caseC oneUse:W
	int _x = (a + b - c - 1) / 2;
	int _y = (-a + b + c - 1) / 2;
	int _z = (a - b + c - 1) / 2;
	int _w = 1;
	if (!chk(_x, _y, _z, _w)) return -LINF;
	return calc(_x, _y, _z, _w);
}
long long calc(int a, int b, int c) {
	long long ret = -LINF;
	chmax(ret, fa(a, b, c));
	chmax(ret, fb(a, b, c));
	chmax(ret, fc(a, b, c));
	chmax(ret, fd(a, b, c));
	chmax(ret, fe(a, b, c));
	return ret;
}
int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int t; cin >> t;
	while (t--) {
		int a, b, c; cin >> a >> b >> c;
		cin >> x >> y >> z >> w;
		long long ans = 0;
		rep(i, a + 1) chmax(ans, calc(i, b, c));
		rep(i, b + 1) chmax(ans, calc(a, i, c));
		rep(i, c + 1) chmax(ans, calc(a, b, i));
		cout << ans << endl;
	}
	return 0;
}