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Sure! Here's the requested content in spun format with synonyms:
Candy is crazy about Phineas and also Ferb.
Cara Fred, and Ferb.
Fred Candy, and Foster.
Candace revels in being with Finn and Foster.
Philip has a special place in the heart of Cassandra, and Foster.
Cathy shares a bond with both Phineas and Ferb.
I hope you find these variations helpful!