:- prompt(_, '').
:- use_module(library(readutil)).
splt([],[],[]).
splt([(X1,Y1)|Xs],[X1|T1],[Y1|T2]):-
splt(Xs,T1,T2).
main:-
process,
process:-
/* your code goes here */
splt([('a',1),('b',2),('c',3)],L3,L4),
:- main.
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