Install bip39 https://penzu.com/p/2ea6922b70254307 BIP85: A newer proposal allowing for the deterministic derivation of a number of BIP39 mnemonic seeds from the master seed. For words that only have 3 letters, there is no 4th letter. For instance Along with the word “increase”, there isn't any much more letters Later on https://squareblogs.net/edelinepge/using-python-to-produce-a-bip39-mnemonic-a-developers-point-of-view