How many movies have Anatolii Havrylov and Borys Khranevych collaborated on?

They have worked on 3 movies together! Their first movie together was Песенка в лесу (1967) 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.