Singular

LIB "polymake.lib";
==> Welcome to polymake version
==> Copyright (c) 1997-2015
==> Ewgenij Gawrilow, Michael Joswig (TU Darmstadt)
==> http://www.polymake.org
intmat
M[6][4]=
1,1,1,2,
1,-1,-1,-2,
1,1,0,0,
1,-1,0,0,
1,0,1,0,
1,0,-1,0;
polytope p = polytopeViaPoints(M);
hStarVector(p);
==> polymake: used package ppl
==>   The Parma Polyhedra Library (PPL): A C++ library for convex polyhedra
==>   and other numerical abstractions.
==>   http://www.cs.unipr.it/ppl/
==> 
==> polymake: used package libnormaliz
==>   Normaliz is a tool for computations in affine monoids, vector configura\
   tions, lattice polytopes, and rational cones.
==>   Copyright by Winfried Bruns, Bogdan Ichim, Christof Soeger.
==>   http://www.math.uos.de/normaliz/
==> 
==> 1,3,11,1