Aha! Yep, that was the problem. Thanks! (I was reading the requirement as "If at a particular point no sequence of words from the dictionary can be inserted to

Aha! Yep, that was the problem. Thanks! (I was reading the requirement as "If at a particular point no sequence of words from the dictionary can be inserted to complete the number, a single digit can be inserted" -- which still makes a lot more sense to me than the actual requirement!) Sadly, no programming language could have helped me with this bug. :) https://gist.github.com/752506 https://gist.github.com/752506