I took the index of the words, converted the quantity to binary, extra 3 zeros, calculated the sha256 digest, took the first part of the hexadecimal to transform it to binary, extra 3 zeros on the eight digits of your binary and received 00000010011 which translates to 19 in decimal. https://wisesocialsmedia.com/story4220580/the-5-second-trick-for-ledger-seed-phrase-bip39