I took the index of the words, transformed the number to binary, extra 3 zeros, calculated the sha256 digest, took the first Section of the hexadecimal to transform it to binary, additional 3 zeros for the 8 digits with the binary and got 00000010011 which interprets to 19 in decimal. http://remingtonjszi611.almoheet-travel.com/from-words-to-wide-range-how-to-efficiently-use-bip39-passphrases-for-your-copyright-wallets