In the animated American TV show "The Flintstones", what does Fred yell at the end of the closing theme?

The windows don’t have screens or glass, so he can crawl through the windows.

was going to say Yabba dabba Doo like most people, but remembered that Fred yells that at the START ;) 😉

what a misleading question… i was sure from the fruity pebbles commercial that it was yabba-dabba-do!!!!! lol