I took the index from the words, converted the quantity to binary, included three zeros, calculated the sha256 digest, took the primary A part of the hexadecimal to convert it to binary, added 3 zeros on the eight digits of your binary and acquired 00000010011 which interprets to 19 in https://maroonbookmarks.com/story18859985/the-fact-about-bip39-seed-phrase-word-list-that-no-one-is-suggesting