I took the index on the words, converted the selection to binary, additional 3 zeros, calculated the sha256 digest, took the main part of the hexadecimal to convert it to binary, included three zeros towards the 8 digits of your binary and acquired 00000010011 which interprets to 19 in decimal. https://bookmarkshq.com/story21154198/fascination-about-bip39-english-words