I took the index on the words, converted the amount to binary, extra 3 zeros, calculated the sha256 digest, took the first Component of the hexadecimal to convert it to binary, added three zeros towards the 8 digits in the binary and received 00000010011 which translates to 19 in decimal. https://socialevity.com/story20605861/the-2-minute-rule-for-bip39-all-words