fact: Definition le_lt_n_Sm : ∀ n m : nat, n ≤ m → n < S m.
imports: Program Utf8 Equations.Prop.Equations Bvector List Relations Arith Wf_nat Lia Coq.Lists.SetoidList Coq.Sorting.Sorting Coq.Sorting.Permutation Coq.Sorting.PermutSetoid Bool EquivDec Permutation