I took the index in the words, transformed the variety to binary, included a few zeros, calculated the sha256 digest, took the initial Component of the hexadecimal to transform it to binary, extra three zeros for the 8 digits with the binary and got 00000010011 which interprets to 19 in https://apollobookmarks.com/story18967401/the-fact-about-bip39-seed-phrase-word-list-that-no-one-is-suggesting