How many movies have Lubomír Kostelka and Luděk Kopřiva acted in together?

They have worked on 12 movies together! Their first movie together was Sedm koní a vavříny (1966) while their highest rated movie together was You Are a Widow, Sir (1971). They have not worked together since Kačenka a zase ta strašidla (1993). They are most known for their comedy films together.