I took the index of the words, converted the quantity to binary, extra 3 zeros, calculated the sha256 digest, took the 1st Element of the hexadecimal to transform it to binary, included three zeros towards the 8 digits from the binary and received 00000010011 which translates to 19 in decimal. https://thesocialroi.com/story9426435/facts-about-bip39-seed-phrase-github-revealed