Welcome to SWI-Prolog (Multi-threaded, Version 5.6.20)
Copyright (c) 1990-2006 University of Amsterdam.
SWI-Prolog comes with ABSOLUTELY NO WARRANTY. This is free software,
and you are welcome to redistribute it under certain conditions.
Please visit http://www.swi-prolog.org for details.

For help, use ?- help(Topic). or ?- apropos(Word).



Yes
[50, 1, 1, 2, 30, 11, 43, 12] -> [1, 1, 2, 11, 12, 30, 43, 50]: OK

Yes

% halt