I took the index with the words, converted the amount to binary, included 3 zeros, calculated the sha256 digest, took the initial Element of the hexadecimal to convert it to binary, additional 3 zeros on the 8 digits in the binary and received 00000010011 which interprets to 19 in decimal. https://bbsocialclub.com/story20920921/facts-about-bip39-seed-phrase-word-list-revealed