Output formats are as follows: "Pretty": Matrices are printed in human-readable form. This is the default for tty output. Each matrix is followed by an assignment of values falsifying the "bad guy" if there is one. "Ugly": Matrices are printed in a standard machine- readable form with zero as break character. No headings, comments, etc. are included. "Summary": Only the numbers of matrices are printed. This is useful for checking the size of a job before getting a printout of matrices. It runs slightly faster than "pretty" or "ugly". "None": No matrices are printed, although the final statistics are still sent to the tty. This is the default for file output.