I took the index of your words, transformed the quantity to binary, additional 3 zeros, calculated the sha256 digest, took the main Portion of the hexadecimal to convert it to binary, additional three zeros towards the 8 digits in the binary and received 00000010011 which translates to 19 in decimal. https://socialmediainuk.com/story20216355/examine-this-report-on-bip39-passphrase