Find the missing permutation: Difference between revisions

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=={{header|Picat}}==
=={{header|Picat}}==
Here are several approaching, including constraint modelling, with sets (ordset), and permutations.
Here are several approaches, including constraint modelling, sets (ordset), and permutations.
<lang picat>import util.
<lang picat>import util.
import ordset.
import ordset.