There is an old waffle-shape that/
Can show a note’s # and not b,/
A tic-tac-toe grid/
That stands for a £ -/
The # is where it is @.///
(Key: # = sharp; b = flat; £ = quid; @ = at; # = hashtag)
Nothing topical about this, I was just musing on the hashtag – and inspired by this.