I took the index of your words, transformed the variety to binary, included a few zeros, calculated the sha256 digest, took the first A part of the hexadecimal to convert it to binary, added three zeros to the 8 digits from the binary and got 00000010011 which translates to 19 https://madesocials.com/story4415632/a-secret-weapon-for-bip39-words-to-numbers