I took the index with the words, transformed the selection to binary, added three zeros, calculated the sha256 digest, took the primary Portion of the hexadecimal to convert it to binary, additional 3 zeros for the 8 digits in the binary and got 00000010011 which interprets to 19 in decimal. https://getsocialpr.com/story19838197/examine-this-report-on-bip39-passphrase