#include <bits/stdc++.h>
#define int long long

using namespace std;

void solve () {
    array <int, 3> b {};
    for (int i = 0; i < 3; i ++) {
        cin >> b[i];
    }
    array <int, 3> d {};
    for (int i = 0; i < 3; i ++) {
        cin >> d[i];
    }

    int ans = 0;
    for (int i = 0; i < 3; i ++) {
        if (b[i] && d[(i + 1) % 3]) {
            int t = min (b[i], d[(i + 1) % 3]);
            ans += t;
            b[i] -= t;
            d[(i + 1) % 3] -= t;
        }
    }
    for (int i = 0; i < 3; i ++) {
        if (b[i] && d[i]) {
            int t = min (b[i], d[i]);
            b[i] -= t;
            d[i] -= t;
        }
    }
    for (int i = 0; i < 3; i ++) {
        ans -= b[i];
    }

    cout << ans << '\n';
}

signed main () {
    ios::sync_with_stdio (false);
    cin.tie (nullptr);

    int T = 1;
    cin >> T;

    while (T --) {
        solve ();
    }

    return 0;
}