I took the index from the words, converted the variety to binary, included 3 zeros, calculated the sha256 digest, took the primary Portion of the hexadecimal to convert it to binary, included three zeros to your 8 digits from the binary and obtained 00000010011 which translates to 19 in decimal. https://socialrator.com/story9501960/the-2-minute-rule-for-bip39-all-words