#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
 
#define ALL(obj) (obj).begin(),(obj).end()
#define SPEED cin.tie(0);ios::sync_with_stdio(false);
 
template<class T> using PQ = priority_queue<T>;
template<class T> using PQR = priority_queue<T,vector<T>,greater<T>>;
 
constexpr long long MOD = (long long)1e9 + 7;
constexpr long long MOD2 = 998244353;
constexpr long long HIGHINF = (long long)1e18;
constexpr long long LOWINF = (long long)1e15;
constexpr long double PI = 3.1415926535897932384626433;
 
template <class T> vector<T> multivector(size_t N,T init){return vector<T>(N,init);}
template <class... T> auto multivector(size_t N,T... t){return vector<decltype(multivector(t...))>(N,multivector(t...));}
template <class T> void corner(bool flg, T hoge) {if (flg) {cout << hoge << endl; exit(0);}}
template <class T, class U>ostream &operator<<(ostream &o, const map<T, U>&obj) {o << "{"; for (auto &x : obj) o << " {" << x.first << " : " << x.second << "}" << ","; o << " }"; return o;}
template <class T>ostream &operator<<(ostream &o, const set<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const multiset<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const vector<T>&obj) {o << "{"; for (int i = 0; i < (int)obj.size(); ++i)o << (i > 0 ? ", " : "") << obj[i]; o << "}"; return o;}
template <class T, class U>ostream &operator<<(ostream &o, const pair<T, U>&obj) {o << "{" << obj.first << ", " << obj.second << "}"; return o;}
void print(void) {cout << endl;}
template <class Head> void print(Head&& head) {cout << head;print();}
template <class Head, class... Tail> void print(Head&& head, Tail&&... tail) {cout << head << " ";print(forward<Tail>(tail)...);}
template <class T> void chmax(T& a, const T b){a=max(a,b);}
template <class T> void chmin(T& a, const T b){a=min(a,b);}
void YN(bool flg) {cout << (flg ? "YES" : "NO") << endl;}
void Yn(bool flg) {cout << (flg ? "Yes" : "No") << endl;}
void yn(bool flg) {cout << (flg ? "yes" : "no") << endl;}

int main() {
	int T; cin >> T;
	while (T--){
		vector<ll> X(3),Y(3);
		ll A,B,C,D,E,F; cin >> X[0] >> X[1] >> X[2] >> Y[0] >> Y[1] >> Y[2];
		ll ans = HIGHINF;
		for(int a = 0; a < 3; ++a){
			for(int b = 0; b < 3; ++b){
				for(int c = 0; c < 3; ++c){
					for(int d = 0; d < 3; ++d){
						for(int e = 0; e < 3; ++e){
							for(int f = 0; f < 3; ++f){
								ll s=0,t=0,u=0,cnt=0;
								if(X[0]>=X[a]-d) s=X[a]-d,cnt+=(X[0]-s)*Y[0]; 
								if(X[1]>=X[b]-e) t=X[b]-e,cnt+=(X[1]-t)*Y[1]; 
								if(X[2]>=X[c]-f) u=X[c]-f,cnt+=(X[2]-u)*Y[2];
								if(s>0&&t>0&&u>0&&s!=t&&t!=u&&u!=s&&((t<s&&t<u)||(s<t&&u<t))) chmin(ans,cnt);
							}							
						}
					}
				}							
			}			
		}
		if(ans==HIGHINF) ans = -1;
		cout << ans << endl;
	}
	
	
    return 0;
}