I took the index on the words, converted the range to binary, added three zeros, calculated the sha256 digest, took the initial Component of the hexadecimal to convert it to binary, extra a few zeros towards the 8 digits of the binary and received 00000010011 which interprets to 19 in https://ok-social.com/story4435445/detailed-notes-on-copyright-wallet-seed-phrase-out-of-bip39