3 commits

Author	SHA1	Message	Date
Joe Ardent	b4bf4e61ad	use bitand for sets	2022-12-03 16:22:48 -08:00
Joe Ardent	ad309f5b33	part 2 done	2022-12-03 16:15:56 -08:00
Joe Ardent	4ae6b3cb7f	day 3, part 1 done	2022-12-03 15:06:01 -08:00