I took the index in the words, converted the quantity to binary, included three zeros, calculated the sha256 digest, took the primary Element of the hexadecimal to transform it to binary, additional 3 zeros into the eight digits with the binary and obtained 00000010011 which interprets to 19 in decimal. https://bookmarks-hit.com/story19606391/a-secret-weapon-for-bip39-words-to-numbers