I took the index in the words, converted the number to binary, included 3 zeros, calculated the sha256 digest, took the 1st Element of the hexadecimal to transform it to binary, extra three zeros on the eight digits with the binary and acquired 00000010011 which translates to 19 in decimal. https://bookmark-nation.com/story18702368/the-definitive-guide-to-bip39-seed-phrase