#include <fstream.h>
int main()
{
ifstream f("iepuri.in");
ofstream g("iepuri.out");
long t,i,j,a,b,c,n,zi,x,y,z;
f>>t;
f>>x>>y>>z>>a>>b>>c>>n;
		for (j=3;j<=n;j++)
			{
			zi=a*z+b*y+c*x;
			x=y;
			y=z;
			z=zi;
			}
	g<<zi;
for (i=2;i<=t;i++)
	{
	f>>x>>y>>z>>a>>b>>c>>n;
		for (j=3;j<=n;j++)
			{
			zi=a*z+b*y+c*x;
			x=y;
			y=z;
			z=zi;
			}
	g<<"\n"<<zi;
	}
f.close();
g.close();
return 0;
}