Bip39 dictionary https://jsbin.com/titaniseko A BIP39 seed phrase designed with appropriate randomness can't be guessed as a result of brute force, mainly because you'll find just too a lot of permutations. For words that have only three letters, there is absolutely no 4th letter. One example is Using the word “add”, https://socials360.com/story10706458/bip39-is-not-defined-the-single-best-strategy-to-use-for-bip39-word-list-txt-https-dzen-ru-bip39-phrase-com