Bip39-Standalone. Always check if hardware wallet company explicitly mention the ability to restore wallet from another compatible wallet (BIP39/BIP44) within the documentation. For words that only have 3 letters, there isn't a 4th letter. For instance with the word “increase”, there won't be any a lot more letters Later on https://tintindirectory.com/listings579089/bip39-list-https-linktr-ee-bip39-bip39-mnemonic-generator-fundamentals-explained