http://i3xi5qxvbrngh3g6o7czwjfxwjzigook7zxzjmgwg5b7xnjcn5hzciad.onion/proposals/194-mnemonic-urls.html
. … etc
For a 6 word sentence, with 8 (3b) templates, we need ~12b (4k word)
dictionaries for each word category.
If multiple words of the same category are used, they must either play
different grammatical roles (eg subj vs obj, or adj on a different item), be
chosen from different dictionaries, or there needs to be an order-agnostic way
to join them at the bit level.