∀ {α : Type u_1} [inst : BEq α] [inst_1 : LawfulBEq α] {xs ys : List α} (h : xs.Perm ys) (w : Fin ys.length),
  List.countBefore xs[⋯.idxBij w] xs ↑(⋯.idxBij w) < (List.filter (fun x => x == xs[⋯.idxBij w]) ys).length