I took the index in the words, converted the variety to binary, extra 3 zeros, calculated the sha256 digest, took the primary part of the hexadecimal to transform it to binary, included a few zeros to your eight digits from the binary and got 00000010011 which interprets to 19 in https://webcastlist.com/story19962145/a-secret-weapon-for-bip39-words-to-numbers