I took the index of the words, transformed the variety to binary, included 3 zeros, calculated the sha256 digest, took the primary Section of the hexadecimal to transform it to binary, extra a few zeros into the eight digits in the binary and obtained 00000010011 which interprets to 19 in https://bookmarkzap.com/story19046040/the-fact-about-bip39-seed-phrase-word-list-that-no-one-is-suggesting