Bip39 recovery tool https://writeablog.net/ipennywpzc/the-ultimate-overview-to-offline-bip39-generators-remain-secure A BIP39 seed phrase produced with proper randomness can not be guessed as a result of brute power, because you will discover simply too many permutations. For words that have only 3 letters, there is absolutely no 4th letter. For example with the word “add”, there https://bookmarkunit.com/story19903277/how-does-bip39-work-not-known-details-about-bip39-word-list-txt-https-linktr-ee-bip39