How many movies have C. Narayana Reddy and Chellapilla Satyanarayana Sastry collaborated on?

They have worked on 3 movies together! Their first movie together was Kathiki Kankanam (1971) while their highest rated movie together was Thota Ramudu (1975). They have not worked together since Thota Ramudu (1975). They are most known for their drama films together.