I took the index on the words, transformed the variety to binary, extra 3 zeros, calculated the sha256 digest, took the 1st part of the hexadecimal to transform it to binary, included a few zeros to your eight digits with the binary and obtained 00000010011 which translates to 19 in https://easiestbookmarks.com/story18886507/fascination-about-bip39-english-words