Bip39 Seed Phrase. Often Test if hardware wallet maker explicitly mention the chance to restore wallet from every other compatible wallet (BIP39/BIP44) during the documentation. For words that only have three letters, there is absolutely no 4th letter. One example is with the word “incorporate”, there aren't any extra letters https://99webdirectory.com/listings13017583/bip39-passphrase-https-linktr-ee-bip39-the-ultimate-guide-to-bip39-vs-slip39