Copyright 1992 by Jutta Degener and Carsten Bormann,Technische Universitaet BerlinAny use of this software is permitted provided that this notice is notremoved and that neither the authors nor the Technische Universitaet Berlinare deemed to have made any representations as to the suitability of thissoftware for any purpose nor are held responsible for any defects ofthis software.  THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.As a matter of courtesy, the authors request to be informed about usesthis software has found, about bugs in this software, and about anyimprovements that may be of general interest.Berlin, 15.09.1992Jutta DegenerCarsten Bormann