I took the index from the words, transformed the variety to binary, added three zeros, calculated the sha256 digest, took the 1st Section of the hexadecimal to convert it to binary, added 3 zeros to your eight digits from the binary and got 00000010011 which interprets to 19 in decimal. https://macrobookmarks.com/story19009372/5-simple-techniques-for-bip39-word-list-pdf