How many movies have Alla Hrachova and Liudmyla Kozub collaborated on?

They have worked on 3 movies together! Their first movie together was Страшный, серый, лохматый (1971) while their highest rated movie together was Петушок и солнышко (1974). They have not worked together since Ёжик и девочка (1988). They are most known for their animation films together.