I took the index of the words, transformed the number to binary, extra 3 zeros, calculated the sha256 digest, took the initial Component of the hexadecimal to transform it to binary, added three zeros towards the 8 digits of the binary and received 00000010011 which translates to 19 in decimal. https://topsocialplan.com/story4424785/5-simple-techniques-for-bip39-word-list-pdf