As I said in another post, I was just responding to Ultra's plea for more puzzles to be posted straight here to give the Pro's and Feature Writers a chance to get some rare points.
I was just having a bit of fun, that's all, but it seems not too popular, so I'm sorry for doing it.
Will have to give Arunas the point as he has answered it correctly but really he should have given Allemano the chance to get a response as he clearly knew the answer but wasn't sure whether to post it..