I took the index in the words, converted the amount to binary, added a few zeros, calculated the sha256 digest, took the very first Section of the hexadecimal to convert it to binary, included three zeros to your 8 digits from the binary and got 00000010011 which interprets to 19 https://myeasybookmarks.com/story4320197/new-step-by-step-map-for-ledger-seed-phrase-bip39