I took the index from the words, converted the number to binary, included a few zeros, calculated the sha256 digest, took the 1st Section of the hexadecimal to transform it to binary, additional three zeros on the eight digits from the binary and bought 00000010011 which translates to 19 in https://mysitesname.com/story8576417/the-basic-principles-of-bip39-passphrase-generator