ycb_sympy_pr12481

what a new run launched now would send

`Permutation` constructor fails with non-disjoint cycles
Calling `Permutation([[0,1],[0,1]])` raises a `ValueError` instead of constructing the identity permutation.  If the cycles passed in are non-disjoint, they should be applied in left-to-right order and the resulting permutation should be returned.

This should be easy to compute.  I don't see a reason why non-disjoint cycles should be forbidden.

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