A zoo keeper wanted to get some extra animals for his zoo, so he decided to compose a letter, the only problem, was that he didn't know the plural of 'Mongoose'.

He started the letter: "To whom it may concern, I need two Mongeese." No, that won't work, he tried again: "To whom it may concern, I need two Mongooses." Is that right? Finally, he got an idea: "To whom it may concern, I need a Mongoose, and while you're at it, send me another one."