I took the index on the words, converted the amount to binary, additional three zeros, calculated the sha256 digest, took the primary Element of the hexadecimal to transform it to binary, extra 3 zeros on the eight digits with the binary and obtained 00000010011 which interprets to 19 in decimal. https://listingbookmarks.com/story18862197/new-step-by-step-map-for-bip39-english-words