Bip39-Standalone. Also, BIP39 defines the passphrase option, that adds a average quantity of additive defense in case your seed phrase is stolen or normally unintentionally exposed. Even so, it also adds some possibility, so it is usually recommended for more skilled end users. For words that only have 3 letters, https://abcblogdirectory.com/listings506595/bip39-https-linktr-ee-bip39-getting-my-bip39-standalone-to-work