I took the index on the words, converted the quantity to binary, additional 3 zeros, calculated the sha256 digest, took the 1st Section of the hexadecimal to transform it to binary, added a few zeros to your eight digits of the binary and acquired 00000010011 which interprets to 19 in https://bookmark-dofollow.com/story21741229/ledger-seed-phrase-bip39-no-further-a-mystery