I took the index from the words, transformed the number to binary, additional 3 zeros, calculated the sha256 digest, took the first part of the hexadecimal to convert it to binary, extra three zeros for the 8 digits in the binary and bought 00000010011 which translates to 19 in decimal. http://edgargvkh682.theburnward.com/from-mnemonics-to-security-understanding-bip39-passphrases-and-their-importance-in-copyright