I took the index from the words, transformed the range to binary, added three zeros, calculated the sha256 digest, took the main Element of the hexadecimal to transform it to binary, included three zeros on the eight digits of the binary and obtained 00000010011 which interprets to 19 in decimal. http://josueaqpi312.huicopper.com/from-words-to-riches-just-how-to-successfully-make-use-of-bip39-passphrases-for-your-copyright-budgets