I took the index in the words, converted the amount to binary, added a few zeros, calculated the sha256 digest, took the 1st Section of the hexadecimal to convert it to binary, additional three zeros into the 8 digits of your binary and acquired 00000010011 which translates to 19 in https://setbookmarks.com/story19649220/the-fact-about-bip39-seed-phrase-word-list-that-no-one-is-suggesting