Thanks, spaz. I will look over the comments and see if I can emphasize the why.

Many of the what comments are a result of my coding style. I usually tend to write the entire program as comments, then fill in the actual code. I probably knocked out some of the original comments in the process of restructuring.

I agree that tr/// would be better than s///. (I'm not sure why I escaped the quote in the first place!)

Impossible Robot