I took the index of your words, converted the range to binary, extra 3 zeros, calculated the sha256 digest, took the very first A part of the hexadecimal to convert it to binary, additional 3 zeros to your eight digits with the binary and obtained 00000010011 which translates to 19 https://hindibookmark.com/story20472553/top-guidelines-of-bip39-word-list-pdf