I took the index of your words, converted the variety to binary, added 3 zeros, calculated the sha256 digest, took the 1st A part of the hexadecimal to transform it to binary, included three zeros to your 8 digits in the binary and obtained 00000010011 which translates to 19 in https://funny-lists.com/story19974800/new-step-by-step-map-for-ledger-seed-phrase-bip39