I took the index on the words, transformed the quantity to binary, extra three zeros, calculated the sha256 digest, took the primary A part of the hexadecimal to convert it to binary, additional 3 zeros into the 8 digits of the binary and bought 00000010011 which translates to 19 in https://postheaven.net/tiablexcen/mastering-your-copyright-protection-the-essential-overview-to-bip39-passphrases