I took the index from the words, converted the range to binary, included 3 zeros, calculated the sha256 digest, took the main part of the hexadecimal to convert it to binary, additional three zeros for the 8 digits in the binary and obtained 00000010011 which interprets to 19 in decimal. https://one-bookmark.com/story18890951/not-known-facts-about-bip39-english-words