I took the index in the words, converted the quantity to binary, added three zeros, calculated the sha256 digest, took the very first A part of the hexadecimal to convert it to binary, added three zeros to the 8 digits of your binary and bought 00000010011 which interprets to 19 https://bookmarkloves.com/story20797662/ledger-seed-phrase-bip39-no-further-a-mystery