Bip39 mnemonic to private key https://papaly.com/1/eMEf Let's think It'll be 10x a lot quicker than the GFX card previously mentioned so roughly two,4M hashes/s. A standard attacker will personal a number of these specialised units. For words that have only 3 letters, there isn't a 4th letter. One example is https://onelifesocial.com/story5629849/bip39-trust-wallet-5-simple-statements-about-bip39-converter-explained-https-www-youtube-com-channel-ucupxfytj0fb78sq55hu6ocw