Hint Resolve col_permutation_1 col_permutation_2
col_permutation_3 col_permutation_4 col_permutation_5 : sTarski.
Hint Resolve col_permutation_1 col_permutation_2
col_permutation_3 col_permutation_4 col_permutation_5 : Col.
Ltac Col := eauto with Col.
(** Trivial lemmas for Col. *)

Lemma l4_14 :  forall A B C A' B',
Col A B C -> Cong A B A' B' ->
exists C', Cong_3 A B C A' B' C'.