I took the index of the words, converted the quantity to binary, extra three zeros, calculated the sha256 digest, took the first Component of the hexadecimal to transform it to binary, extra 3 zeros to the 8 digits from the binary and received 00000010011 which translates to 19 in decimal. https://topsocialplan.com/story4679239/not-known-facts-about-bip39-english-words