I took the index of your words, converted the range to binary, added a few zeros, calculated the sha256 digest, took the initial Section of the hexadecimal to convert it to binary, added three zeros to your eight digits on the binary and bought 00000010011 which interprets to 19 in https://bookmarkshome.com/story5285475/a-secret-weapon-for-bip39-words-to-numbers