Bloody 'ell Magi, It's not that difficult!! The sequence you've described, 'LW51dbo', is universally recognisable to those in the intelligence communities. Go into any penny arcade, theatre box office etc, and ask for 'LW51dbo' and you'll be provided with the following; "Good morning Magi. Your mission, should you choose to accept it, is to seek out the bonehead that provided you with such a baffling code and give them a piece of your mind! Should you or any member of your iron force be captured or killed, the secretary of state will disavow any knowledge of your actions. This tape will self destruct in 5 seconds. Good luck Magi." It could also be identifying a vehicle registration plate.