  In this short paper, we try to explain how to use our program which has been
written in Wolfram Mathematica to get the massless spectrum of any
Landau-Ginzburg orbifold. The technique has been developed by Witten-Kachru
theoretically, but calculating it for an explicit Landau-Ginzburg model is
exhausting and in general, beyond human ability to calculate using pen and
paper.
