I took the index with the words, converted the number to binary, extra 3 zeros, calculated the sha256 digest, took the first Section of the hexadecimal to convert it to binary, included a few zeros towards the eight digits of your binary and received 00000010011 which interprets to 19 in https://toplistar.com/story20891032/a-secret-weapon-for-bip39-words-to-numbers