Bip39 copyright https://zenwriting.net/keenanctdp/how-to-create-a-bip39-seed-a-step-by-step-guide The buy in the mnemonic phrase issues. In case you mess up the buy then you cannot Get well your wallet. Your money will be lost without end. Ensure you have a suitable backup. For words that only have three letters, there isn't a 4th letter. For https://andersonsaeu988.iamarrows.com/bip39-generator-online-the-best-devices-for-secure-wallet-creation