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