I took the index from the words, converted the quantity to binary, added a few zeros, calculated the sha256 digest, took the very first Component of the hexadecimal to transform it to binary, extra 3 zeros towards the 8 digits from the binary and received 00000010011 which translates to 19 https://hylistings.com/story19921102/detailed-notes-on-copyright-wallet-seed-phrase-out-of-bip39