I took the index in the words, transformed the selection to binary, extra 3 zeros, calculated the sha256 digest, took the initial Portion of the hexadecimal to transform it to binary, included three zeros for the 8 digits of the binary and got 00000010011 which interprets to 19 in decimal. https://nybookmark.com/story20436562/examine-this-report-on-bip39-mnemonic-phrase-tool