I took the index on the words, converted the variety to binary, extra 3 zeros, calculated the sha256 digest, took the 1st Element of the hexadecimal to convert it to binary, added a few zeros into the eight digits of the binary and got 00000010011 which interprets to 19 in http://jaspermuxp089.yousher.com/from-mnemonics-to-security-comprehending-bip39-passphrases-and-their-significance-in-copyright