How many movies have Jarmila Šťastná and Vladimír Valter collaborated on?

They have worked on 4 movies together! Their first movie together was Rovnice o jedné krásné neznámé... (1979) while their highest rated movie together was Pohádka z šafránové louky (1980). They have not worked together since Vrabci z devátého poschodí (1981).