Bip39 first 4 letters https://www.symbaloo.com/mix/bookmarks-xfkm This is certainly why it is best to generate a backup of your seed phrase employing steel copyright wallet like Coinplate, which can be 100% stainless steel and BIP39 compatible. Vault12 would be the pioneer in copyright inheritance administration. Look at our explainer movie earlier https://zbookmarkhub.com/story20013431/bip39-js-new-step-by-step-map-for-bip39-github-https-dzen-ru-bip39-phrase-com