module importm42. accumulate importm41. type b i. type p i -> o. type q i -> o. type r i -> o. type a i. (p b) :- (q X). (r b) :- (q a).
module importm42. accumulate importm41. type b i. type p i -> o. type q i -> o. type r i -> o. type a i. (p b) :- (q X). (r b) :- (q a).