advent2021/data.4a, branch master Advent of Code 2021 https://ai.quorra.org.uk/cgit.cgi/advent2021/atom?h=master 2021-12-09T15:18:28Z Completed part 2 of number 4. 2021-12-09T15:18:28Z ian.cowburn ian.cowburn@ianc-work-macbook.local 2021-12-09T15:18:28Z urn:sha1:0d1e83e9ec2d28b792e912fa21e1aa2815303874