I took the index of the words, converted the quantity to binary, added 3 zeros, calculated the sha256 digest, took the main part of the hexadecimal to convert it to binary, additional three zeros on the 8 digits on the binary and got 00000010011 which interprets to 19 in decimal. https://push2bookmark.com/story19104389/new-step-by-step-map-for-ledger-seed-phrase-bip39