Simplify the following text for a Grade 5 native English-speaking person.
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 .