Bip39 python https://www.empowher.com/user/4550298 That is why you need to produce a backup within your seed phrase employing metallic copyright wallet like Coinplate, which can be 100% stainless steel and BIP39 compatible. For words that have only 3 letters, there isn't a 4th letter. As an example with the word “incorporate”, https://edgargvkh682.theburnward.com/a-novice-s-overview-to-getting-a-bip39-mnemonic-expression