I took the index of the words, converted the variety to binary, extra 3 zeros, calculated the sha256 digest, took the primary Component of the hexadecimal to transform it to binary, extra 3 zeros on the eight digits on the binary and got 00000010011 which translates to 19 in decimal. https://macrobookmarks.com/story18957823/getting-my-bip39-words-to-numbers-to-work