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);
hVector(p);
==> polymake: used package lrs
==>   Implementation of the reverse search algorithm of Avis and Fukuda.
==>   Copyright by David Avis.
==>   http://cgm.cs.mcgill.ca/~avis/lrs.html
==> 
==> 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/
==> 
==> 1,3,3,1