var n,i,t:longint;
    x,y,z,a,b,c,d:integer;
    f,g:text;
begin
assign(f,'iepuri.in');reset(f);
assign(g,'iepuri.out');rewrite(g);
readln(f,t);
for d:=1 to t do
    begin
    readln(f,x,y,z,a,b,c,n);
    for i:=3 to n do
        begin
        if i mod 3=0 then x:=z*a+y*b+x*c;
        if i mod 3=1 then y:=x*a+z*b+y*c;
        if i mod 3=2 then z:=y*a+x*b+z*c;
        end;
    if n mod 3=0 then writeln(g,x);
    if n mod 3=1 then writeln(g,y);
    if n mod 3=2 then writeln(g,z);
   end;
close(f);close(g);
end.