I took the index of your words, converted the range to binary, additional 3 zeros, calculated the sha256 digest, took the first A part of the hexadecimal to convert it to binary, included three zeros on the 8 digits of your binary and acquired 00000010011 which translates to 19 in https://bookmarkahref.com/story18997118/the-definitive-guide-to-bip39-seed-phrase