I took the index in the words, converted the number to binary, additional 3 zeros, calculated the sha256 digest, took the primary Element of the hexadecimal to convert it to binary, added three zeros for the eight digits in the binary and obtained 00000010011 which translates to 19 in decimal. https://monobookmarks.com/story18771268/a-secret-weapon-for-bip39-words-to-numbers