I took the index in the words, transformed the quantity to binary, added three zeros, calculated the sha256 digest, took the very first Portion of the hexadecimal to convert it to binary, extra three zeros for the 8 digits from the binary and received 00000010011 which translates to 19 in https://monobookmarks.com/story18720852/examine-this-report-on-bip39-passphrase