Is it amusing or sad that it took so many years for me to notice this peculiar, and quite possibly intentional thing about #braille? I only started figuring it out yesterday, rolling the new braille d20 around in my hands.
So, on this d20, numbers from 1 to 10 are represented with letters from a through j, and numbers from 11 to 20 with k through t.
K is an a but with the dot #3 on top. L is b but with dot #3. M is c but with dot #3. N-d, o-e, p-f, q-g, r-h, s-i, t-j.
The pattern is constant. The second 10 letters in the English braille alphabet are the same as the first 10, but with the dot #3 added on top. All of them!
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@Mayana This is mentioned in the wikipedia page about the derivation:

en.wikipedia.org/wiki/Braille#

It is intriguing.

@ColinTheMathmo Well damn, serves me right for not looking such a basic thing up! This makes a whole lot of sense now. A shame that, beyond the very basics, teachers never made much of an effort to teach us the history of braille.
Thank you for sharing ... even or especially since it is something that I really should've checked on my own. 😂

@Mayana These are the sorts of things I've played with a lot, ad if it's comparatively new then it's not the sort of thing you think to look up.

No harm, no foul.

It is interesting, and there could be a lot more structure, but in truth, if you learn Braille or Morse or similar then you have to program your brain for them ... decoding them via patterns only works in the very short term, and never to fluency.

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@ColinTheMathmo True. But it if you already know braille otherwise, this is a neat thing to also keep in mind. Makes it much easier to remember a letters position in the alphabet if you, like me, are bad at that otherwise.

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