Original: The names Cleo, Dora, and Hilda were later retired, and were replaced with Candy, Dolly, and Hannah, respectively, in the 1968 season.
Simplified: After the season the names Cleo, Dora, and Hilda were retired. Candy, Dolly, and Hannah were used in 1968 instead of Cleo, Dora, and Hilda.