Bip39 Checksum. You'd then do a basic recovery with a command like the one particular underneath. (This command utilizes a sample wallet file bunlded with BTCRecover) And you should have penned it down for those who were being hoping to keep an option open to revive your accounts. From here https://sound-social.com/story9004382/bip39-mnemonic-https-linktr-ee-bip39-5-essential-elements-for-bip-39