A zookeeper needed some extra animals for his zoo, so he decided to write a letter. But unfortunately he didn't know the plural of 'mongoose'.

He started the letter: 'To whom it may concern, I need two mongeese.' But that didn't sound right, so he tried again. 'To whom it may concern, I need two mongooses.' But that didn't sound right either. Then he had an idea. 'To whom it may concern, I need a mongoose, and while you're at it, send me another one.'