I took the index in the words, converted the number to binary, extra three zeros, calculated the sha256 digest, took the primary Component of the hexadecimal to convert it to binary, additional three zeros for the 8 digits of the binary and got 00000010011 which translates to 19 in decimal. https://7prbookmarks.com/story18925668/not-known-facts-about-bip39-english-words