I took the index on the words, converted the range to binary, additional 3 zeros, calculated the sha256 digest, took the 1st Component of the hexadecimal to convert it to binary, additional a few zeros on the eight digits from the binary and obtained 00000010011 which interprets to 19 in https://socialmarkz.com/story9419788/top-guidelines-of-bip39-word-list-pdf