I took the index on the words, transformed the variety to binary, extra a few zeros, calculated the sha256 digest, took the first Component of the hexadecimal to transform it to binary, included 3 zeros on the eight digits in the binary and received 00000010011 which translates to 19 in https://45listing.com/story20674725/the-basic-principles-of-bip39-passphrase-generator