I took the index from the words, transformed the quantity to binary, added three zeros, calculated the sha256 digest, took the very first A part of the hexadecimal to transform it to binary, extra 3 zeros to your eight digits from the binary and got 00000010011 which translates to 19 https://bookmarklinkz.com/story18786127/the-2-minute-rule-for-bip39-all-words