A joke for today

Here is a joke which i really like:

Keen to let the world know he was still alive, Osama bin Laden sent Bush a letter in his own handwriting. Opening the letter, Bush saw only a coded message: "37OHSSV-O773H". Bush couldn't fuigure it out se he asked Dick Cheney what it ment. Cheney didn't know either but suggested sending it to Donald Rumsfeld..
After scratching his head for a few minutes, Rumsfeld said: "Why now try Condi? She has a doctorate, which means she's smart."
Dr Rice studied the letter beut she was baffled too.
As Bush continued to ponder the mysterious message lying on the desk befor him, a White House cleaner enterd the Oval Office. Reading the message, the cleaner asked: "Sir, where did that come from?"
Bush said: "Supposedly it's a message from Osama bin Laden. But what the hell does "37OHSSV-O773H" mean?"
The cleaner cleared her throat and said: "Mr President, I think you've been looking at the message upide down..."