I took the index from the words, converted the range to binary, included a few zeros, calculated the sha256 digest, took the main part of the hexadecimal to transform it to binary, added three zeros to the 8 digits from the binary and received 00000010011 which translates to 19 in https://bookmarklinking.com/story5004651/new-step-by-step-map-for-bip39-english-words