I took the index of the words, converted the quantity to binary, included a few zeros, calculated the sha256 digest, took the main Element of the hexadecimal to transform it to binary, additional a few zeros to your eight digits on the binary and got 00000010011 which translates to 19 https://onlybookmarkings.com/story18740638/a-secret-weapon-for-bip39-words-to-numbers