I took the index from the words, transformed the number to binary, added 3 zeros, calculated the sha256 digest, took the 1st Element of the hexadecimal to convert it to binary, included 3 zeros to the 8 digits on the binary and received 00000010011 which interprets to 19 in decimal. https://bookmarkhard.com/story19591774/fascination-about-bip39-english-words