Trezor one bip39 https://www.giantbomb.com/profile/blathayqvn/ You then opt to allow BIP-39 passphrase assist in the hardware wallet and stamp the passphrase(s) with a hexagonal stainless-steel rod and keep the rod inside of a independent geographical location for your 24-word seed backup in order to: For words that have only 3 letters, https://squareblogs.net/edelinepge/using-python-to-produce-a-bip39-mnemonic-a-developers-point-of-view