I took the index in the words, converted the variety to binary, additional three zeros, calculated the sha256 digest, took the initial part of the hexadecimal to convert it to binary, extra 3 zeros to the eight digits of your binary and obtained 00000010011 which interprets to 19 in decimal. https://funny-lists.com/story19947075/examine-this-report-on-bip39-mnemonic-phrase-tool