This is a lazy post since I don't wanna waste myself on EVERYTHING on my hands right now. [SPOILERS AHEAD] Wow, after one year of 5, we finally got season 3 of our Alphabet Lore, and this lore might be bigger that I thought, with everything in the episode. With the addition of runes, which looks unreal. And somehow "handsigns" which I don't think it's even a language and POSSIBLY be part of 7 since, well... Anyway, my theory for the next episode in going to be a BACKSTORY. Yes, I believe 6 is the same equivalent of Q, and she will show a story about 7 and how letters and numbers exist. Infact, it might be the reason why we see runes in the episode.
what da cat doin