I took the index of the words, transformed the selection to binary, included three zeros, calculated the sha256 digest, took the 1st A part of the hexadecimal to convert it to binary, extra a few zeros to your eight digits of your binary and received 00000010011 which translates to 19 https://followbookmarks.com/story19568741/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator