Bip39 Checksum. You'll then do a essential Restoration using a command such as just one down below. (This command makes use of a sample wallet file bunlded with BTCRecover) And you should have written it down should you had been hoping to maintain a choice open to restore your accounts. https://push2bookmark.com/story19274270/bip39-mnemonic-https-linktr-ee-bip39-bip39-wallet-can-be-fun-for-anyone