zz$#!+,
re: "Larry, Larry, and their brother ..Larry."
Sorry, but you blew the punchline. The joke comes from Newhart, and it is Larry, Darryl and their other brother Darryl, as in "Hi. I'm Larry. This is my brother Darryl and this is my other brother Darryl."
Don't give up! I'm sure humor is quite a challenge for you. One of these days you'll get someone to laugh WITH you instead of AT you - and you can be rightfully proud of the accomplishment.