I took the index from the words, transformed the number to binary, additional 3 zeros, calculated the sha256 digest, took the first Element of the hexadecimal to convert it to binary, extra a few zeros on the 8 digits on the binary and received 00000010011 which translates to 19 in https://wiishlist.com/story19438271/new-step-by-step-map-for-bip39-english-words