Norme bip39 https://www.cheaperseeker.com/u/adeneuwaks BIP85: A more recent proposal allowing for the deterministic derivation of multiple BIP39 mnemonic seeds from the master seed. For words that only have three letters, there isn't any 4th letter. One example is Together with the word “incorporate”, there are no additional letters Later on and https://bookmarklogin.com/story20371839/generate-bip39-phrase-bip39-compatible-wallet-can-be-fun-for-anyone-https-linktr-ee-bip39