Formulation is not buggy, is just bad worded: "permutation blah blah is a permutation because blah blah". Of course is a permutation, but it should say "is an automorfism because blah blah"... And so on. The "math" is right.
The puzzle is not very difficult.
Last fiddled with by LaurV on 2020-09-03 at 06:55
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