I took the index on the words, converted the selection to binary, additional 3 zeros, calculated the sha256 digest, took the 1st Portion of the hexadecimal to transform it to binary, added 3 zeros to the 8 digits with the binary and obtained 00000010011 which interprets to 19 in decimal. https://listbell.com/story8769045/a-review-of-bip39-passphrase