I took the index with the words, transformed the quantity to binary, additional three zeros, calculated the sha256 digest, took the primary part of the hexadecimal to transform it to binary, extra 3 zeros into the eight digits from the binary and obtained 00000010011 which translates to 19 in decimal. https://socialmphl.com/story21571182/helping-the-others-realize-the-advantages-of-bip39-mnemonic-phrase-tool