I took the index in the words, transformed the selection to binary, additional 3 zeros, calculated the sha256 digest, took the 1st Element of the hexadecimal to transform it to binary, added three zeros towards the 8 digits from the binary and got 00000010011 which interprets to 19 in decimal. https://lingeriebookmark.com/story8672138/examine-this-report-on-bip39-mnemonic-phrase-tool