-simplify; intros 7; cases H3;
-cases H (_); cases (H8 y); apply H9; cases (H8 p);
-lapply (H12 H1) as H13; apply (le_le_eq);
-[1: apply (le_transitive ???? H4); apply (Le≪ ? H13); assumption;
-|2: apply (le_transitive ????? H5); apply (Le≫ (\snd p) H13); assumption;]
+simplify; intros 10; cases H (_); cases (H7 y); apply H8; cases (H7 s);
+lapply (H11 H1) as H13; apply (le_le_eq);
+[2: apply (le_transitive ??? H5); apply (Le≪ ? H13); assumption;
+|1: assumption;
+|3: change with (le (os_r ℕ) (\snd y) (\fst y));
+ apply (ge_transitive ??? H5);apply (ge_transitive ???? H4);
+ change with (le (os_l ℕ) (\fst s) (\snd s));
+ apply (Le≫ ? H13); apply le_reflexive;
+|4: assumption;]