#include <fstream>
#define MOD 666013
using namespace std;

ifstream f("iepuri.in");
ofstream g("iepuri.out");

int s[100001],n,x,y,z,a,b,c;

int main()
{
    int t;
    f>>t;
    for(int i=1;i<=t;i++)
    {
        f>>x>>y>>z>>a>>b>>c>>n;
        s[0]=x;
        s[1]=y;
        s[2]=z;
        for(int i=3;i<=n;i++)
            s[i]=a*s[i-1]+b*s[i-2]+c*s[i-3];
        g<<s[n]<<'\n';
    }
    return 0;
}