x, y, z, t, u, v, 
x+y+z+t+u+v
t*u+t*z+u*v+v*x+x*y+y*z
t*u*v+t*u*z+t*y*z+u*v*x+v*x*y+x*y*z
t*u*v*x+t*u*v*z+t*u*y*z+t*x*y*z+u*v*x*y+v*x*y*z
t*u*v*x*y+t*u*v*x*z+t*u*v*y*z+t*u*x*y*z+t*v*x*y*z+u*v*x*y*z
