I took the index in the words, converted the variety to binary, included three zeros, calculated the sha256 digest, took the 1st A part of the hexadecimal to transform it to binary, added a few zeros for the 8 digits on the binary and received 00000010011 which interprets to 19 https://bookmarkcitizen.com/story19151264/the-fact-about-bip39-seed-phrase-word-list-that-no-one-is-suggesting