How many movies have Ivan Mazepa and Oleksandr Lavrov 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 Петушок и солнышко (1974). They are most known for their animation films together.