#include<fstream>
using namespace std;
int main()
{
	ifstream f("iepuri.in");
	ofstream g("iepuri.out");
	int n,i;
	f>>n;
	int x,y,z,a,b,c;
	long ziuaproblema;
	for(i=1;i<=n;i++)
	{
		f>>x>>y>>z>>a>>b>>c>>ziuaproblema;
		long zi=2;
		while(zi<ziuaproblema)
		{
			x=a*z+b*y+c*x;
			zi++;
			int aux=x;
			x=y;
			y=z;
			z=aux;
			
		}
		g<<z<<endl;
	}
	g.close();
	f.close();
	return 0;
}