I took the index of the words, converted the variety to binary, additional 3 zeros, calculated the sha256 digest, took the primary Section of the hexadecimal to transform it to binary, included 3 zeros to your eight digits with the binary and obtained 00000010011 which interprets to 19 in decimal. https://bookmarkinglife.com/story4321865/facts-about-bip39-seed-phrase-word-list-revealed