I took the index on the words, transformed the amount to binary, added 3 zeros, calculated the sha256 digest, took the first part of the hexadecimal to convert it to binary, additional a few zeros towards the 8 digits with the binary and got 00000010011 which translates to 19 in https://bbsocialclub.com/story21495962/examine-this-report-on-bip39-passphrase