I took the index in the words, converted the range to binary, extra 3 zeros, calculated the sha256 digest, took the very first part of the hexadecimal to convert it to binary, included three zeros into the 8 digits on the binary and received 00000010011 which interprets to 19 in https://kingbookmark.com/story18897632/the-greatest-guide-to-seed-phrase-bip39