I took the index from the words, converted the amount to binary, included a few zeros, calculated the sha256 digest, took the initial Section of the hexadecimal to transform it to binary, additional 3 zeros into the eight digits in the binary and obtained 00000010011 which interprets to 19 in https://keybookmarks.com/story18855516/the-basic-principles-of-bip39-passphrase-generator