I took the index of the words, converted the quantity to binary, additional three zeros, calculated the sha256 digest, took the initial part of the hexadecimal to convert it to binary, additional 3 zeros for the 8 digits in the binary and got 00000010011 which translates to 19 in decimal. https://captainbookmark.com/story19556300/the-greatest-guide-to-seed-phrase-bip39