I took the index of the words, transformed the number to binary, additional 3 zeros, calculated the sha256 digest, took the 1st A part of the hexadecimal to convert it to binary, included 3 zeros to the 8 digits of your binary and acquired 00000010011 which translates to 19 in https://letsbookmarkit.com/story18765346/a-review-of-bip39-passphrase