Follow the litre.
They always get called for roughing.
Because of the violins inherent in the cistern.
No one knows, they wait for it to burn out and follow it around for twenty years.
3, duh. (My ex's 9 year old little sister told me this joke, and followed is up with: "and YOU'RE the math guy!" >< Burned.)
It's a nation without a litre.