I took the index of your words, converted the number to binary, added three zeros, calculated the sha256 digest, took the initial A part of the hexadecimal to transform it to binary, extra 3 zeros to your eight digits of your binary and bought 00000010011 which interprets to 19 in https://hyperbookmarks.com/story18898564/5-simple-techniques-for-bip39-word-list-pdf