I took the index from the words, transformed the number to binary, extra 3 zeros, calculated the sha256 digest, took the 1st part of the hexadecimal to convert it to binary, extra three zeros on the 8 digits with the binary and acquired 00000010011 which translates to 19 in decimal. https://thesocialroi.com/story8799223/the-2-minute-rule-for-bip39-all-words