Bip39 spec https://www.cheaperseeker.com/u/adeneuwaks BIP85: A more recent proposal allowing the deterministic derivation of multiple BIP39 mnemonic seeds from a grasp seed. For words that only have 3 letters, there is absolutely no 4th letter. For instance With all the word “incorporate”, there isn't any much more letters Later on and https://hubwebsites.com/story21429671/bip39-standalone-the-definitive-guide-to-bip39-converter-https-dzen-ru-bip39-phrase-com