I took the index from the words, converted the quantity to binary, extra 3 zeros, calculated the sha256 digest, took the 1st Component of the hexadecimal to convert it to binary, additional 3 zeros to your eight digits of the binary and bought 00000010011 which interprets to 19 in decimal. https://health-lists.com/story19582853/the-5-second-trick-for-ledger-seed-phrase-bip39