[Tutor] (no subject)

[Danny Yoo]

> Mr. Yoo im working on a program to write a sudoku puzzle and if 
> something is wrong with the last row i need to re make the whole puzzle 
> over again.

Hi Amadeo,

In the future, please use the "Reply to All" feature of your email client, 
so that we can keep the conversation on the mailing list.

Here's a separate question that's related to the first: can you write a 
function that asks the user to enter a word, and continues prompting until 
the user enters a non-empty word?