I took the index with the words, converted the selection to binary, extra 3 zeros, calculated the sha256 digest, took the main Section of the hexadecimal to transform it to binary, additional 3 zeros for the 8 digits from the binary and received 00000010011 which interprets to 19 in decimal. https://cyberbookmarking.com/story19074501/examine-this-report-on-bip39-mnemonic-phrase-tool