Lister: Nodnol? Hang on, wait a minute! Nodnol! Nod. Nol. It's in Bulgaria, isn't it!
Cat: Are you sure?
Lister: Geography was my number one subject at school. Nodnol, Bulgaria - rich in animal produce and mineral wealth, just south of Bosnia.
Cat: What's the selim?
Lister: Well, that's obviously Bulgarian for kilometers, isn't it?
Cat: You're so smart, I'm glad I came with you!