+ring_tutor.ml
+fourier_tutor.ml
+reflexivity_tutor.ml
+symmetry_tutor.ml
+assumption_tutor.ml
+contradiction_tutor.ml
+exists_tutor.ml
+split_tutor.ml
+left_tutor.ml
+right_tutor.ml
+ring_tutor
+fourier_tutor
+reflexivity_tutor
+symmetry_tutor
+assumption_tutor
+contradiction_tutor
+exists_tutor
+split_tutor
+left_tutor
+right_tutor
+search_pattern_apply_tutor