Ask HN: Variable naming guide of matching length?

Recently (2-3 months ago?) there was a submission on the front page that gave a large list of programming identifiers of matching length such as "pred" + "succ" to have code align nicely and avoid uneven lines.

It was ordered by character length (2 letters, 3 letters) and tried to group thematically matching identifiers.

I search for hours to no avail to find it again. Does anybody remember it?

A couple of other examples I believe where on the list:

"node" <-> "root" <-> "leaf" "mat" <-> "vec"