I took the index of the words, converted the number to binary, included 3 zeros, calculated the sha256 digest, took the 1st part of the hexadecimal to convert it to binary, included a few zeros to your 8 digits of the binary and obtained 00000010011 which translates to 19 in https://thesocialdelight.com/story4452883/little-known-facts-about-bip39-words