I took the index from the words, transformed the number to binary, included 3 zeros, calculated the sha256 digest, took the first Portion of the hexadecimal to transform it to binary, added a few zeros to the 8 digits with the binary and got 00000010011 which interprets to 19 in https://myeasybookmarks.com/story4338588/the-fact-about-bip39-seed-phrase-word-list-that-no-one-is-suggesting