#include <fstream>

using namespace std;

ifstream cin("iepuri.in");
ofstream cout("iepuri.out");

struct matrix {
    int v[3][3];

    matrix () {

        for (int i = 0; i < 3; ++i) {
            for (int j = 0; j < 3; ++j) {
                if (i != j) {
                    v[i][j] = 0;
                }
                else {
                    v[i][j] = 1;
                }
            }
        }

    }

    void operator = (const matrix& alpha) {

        for (int i = 0; i < 3; ++i) {
            for (int j = 0; j < 3; ++j) {
                v[i][j] = alpha.v[i][j];
            }
        }

    }

    void operator += (const matrix& other) {

        matrix a;

        for (int i = 0; i < 3; ++i) {
            for (int j = 0; j < 3; ++j) {
                a.v[i][j] = v[i][j] + other.v[i][j];
            }
        }

        *this = a;

    }

    void operator *= (const matrix& other) {

        matrix a;

        for (int i = 0; i < 3; ++i) {
            for (int j = 0; j < 3; ++j) {
                a.v[i][j] = 0;
                for (int k = 0; k < 3; ++k) {
                    a.v[i][j] += v[i][k] * other.v[k][j];
                }
            }
        }

        *this = a;

    }

    void operator ^= (int exp) {

        matrix ans, cur;
        cur = *this;

        while (exp) {
            if (exp&1) {
                ans *= cur;
            }
            cur *= cur;
            exp>>=1;
        }

        *this = ans;

    }

};

int main()
{

    int t, x, y, z, a, b, c, n;

    matrix alpha;

    cin >> t;

    for (int i = 0; i < t; ++i) {

        cin >> x >> y >> z >> a >> b >> c >> n;

        alpha.v[0][0] = 0;
        alpha.v[0][1] = 1;
        alpha.v[0][2] = 0;
        alpha.v[1][0] = 0;
        alpha.v[1][1] = 0;
        alpha.v[1][2] = 1;
        alpha.v[2][0] = c;
        alpha.v[2][1] = b;
        alpha.v[2][2] = a;

        alpha ^= n - 2;

        cout << alpha.v[2][0] * x + alpha.v[2][1] * y + alpha.v[2][2] * z << "\n";

    }

    return 0;
}