I took the index on the words, transformed the selection to binary, additional a few zeros, calculated the sha256 digest, took the first part of the hexadecimal to transform it to binary, extra 3 zeros to the 8 digits of your binary and got 00000010011 which translates to 19 in https://throbsocial.com/story20681076/a-secret-weapon-for-bip39-words-to-numbers