I took the index of the words, converted the range to binary, included three zeros, calculated the sha256 digest, took the first part of the hexadecimal to transform it to binary, extra three zeros to the 8 digits of your binary and got 00000010011 which translates to 19 in decimal. https://nowbookmarks.com/story18831908/the-fact-about-valid-bip39-seed-phrase-that-no-one-is-suggesting