I took the index of your words, transformed the number to binary, additional 3 zeros, calculated the sha256 digest, took the primary Component of the hexadecimal to convert it to binary, added 3 zeros on the eight digits with the binary and acquired 00000010011 which translates to 19 in decimal. https://thebookmarkking.com/story19565156/the-definitive-guide-to-bip39-seed-phrase