:- use_module(library(pita)). :- if(current_predicate(use_rendering/1)). :- use_rendering(c3). :- endif. :- pita. :- begin_lpad. card(_, Card): discrete(Card, [2:1/13, 3:1/13, 4:1/13, 5:1/13, 6:1/13, 7:1/13, 8:1/13, 9:1/13, 10:1/13, 11:1/13, 12:1/13, 13:1/13, 14:1/13]). pair :- card(deck1, C), card(deck2, C). :- end_lpad.