For the parsing I used a PEG parsing module (of GNU Guile). That made it really safe and precise, but also cost much more time than fumbling around with regex.

For the parsing I used a PEG parsing module (of GNU Guile). That made it really safe and precise, but also cost much more time than fumbling around with regex. I am more comfortable with my code being probably correct and for a work problem, I would rather use a grammar and parser than some elaborate regex mess in many cases. So I did the same in AoC. This meant however, that I fell behind. Once that happened, I did not continue for long. Coworkers also stopped a bit earlier. Lets see how far I can go with solving this year's puzzles. Hopefully I can share the joy of collecting stars with anyone I know.