Bip39 Checksum. You would then do a simple recovery which has a command such as the 1 underneath. (This command makes use of a sample wallet file bunlded with BTCRecover) Entropy is a sophisticated attribute. Your mnemonic can be insecure if this characteristic is used improperly. Read additional Art is https://myeasybookmarks.com/story4355771/bip39-list-https-linktr-ee-bip39-getting-my-bip39-wallets-to-work