Out of curiosity, do you have a script which does this, or do you do it manually?
I do it manually using HN Search but use a browser extension with keyboard shortcuts that make it faster. More here: https://news.ycombinator.com/item?id=28441182.
The Night Watch (2013) [pdf] - https://news.ycombinator.com/item?id=19289353 - March 2019 (10 comments)
The Night Watch (2013) [pdf] - https://news.ycombinator.com/item?id=16188538 - Jan 2018 (1 comment)
The Night Watch (2013) [pdf] - https://news.ycombinator.com/item?id=13954077 - March 2017 (33 comments)
The Night Watch [pdf] - https://news.ycombinator.com/item?id=12490689 - Sept 2016 (2 comments)
The Night Watch (2013) [pdf] - https://news.ycombinator.com/item?id=9671020 - June 2015 (21 comments)
The Night Watch - https://news.ycombinator.com/item?id=6741804 - Nov 2013 (3 comments)
The Night Watch - https://news.ycombinator.com/item?id=6735980 - Nov 2013 (3 comments)