#include<iostream>
#include<fstream>
#include<math.h>
using namespace std;
ifstream fin("iepuri.in");
ofstream fout("iepuri.out");

int main()
{	int a,b,c,n,z,y,x,dubla,t;
	cin>>t;
	while(t!=0)
	{
		t--;
		fin>>x>>y>>z>>a>>b>>c>>n;
		if(n>3)
			{
				n=n-2;
				while(n!=0)
				{
					n--;
					dubla=z;
					z=a*z+b*y+c*x;
					x=y;
					y=dubla;
					
				}
			}
		fout<<z<<endl;
	}
}