I took the index on the words, transformed the range to binary, extra 3 zeros, calculated the sha256 digest, took the initial part of the hexadecimal to transform it to binary, additional 3 zeros for the 8 digits on the binary and acquired 00000010011 which translates to 19 in decimal. https://ticketsbookmarks.com/story18722747/detailed-notes-on-copyright-wallet-seed-phrase-out-of-bip39