I took the index in the words, converted the amount to binary, additional three zeros, calculated the sha256 digest, took the initial Component of the hexadecimal to convert it to binary, added 3 zeros to the 8 digits on the binary and got 00000010011 which interprets to 19 in decimal. https://bookmarkstime.com/story19220416/little-known-facts-about-bip39-words