#include <iostream>
#include <fstream>
using namespace std;
int x,y,z,a,b,c,T,cx,cy;
long long N;

int main()
{
    ifstream f("iepuri.in");
    ifstream g("iepuri.out");
    int i,j;
    f>>T;
    for(i=1; i<=T; i++)
    {
        f>>x>>y>>z>>a>>b>>c>>N;
        for(j=3; j<=N; j++)
        {
            cx=y;
            cy=z;
            z=a*z+b*y+c*x;
            x=cx;
            y=cy;
        }
        g<<z<<endl;
    }
}