I took the index from the words, transformed the variety to binary, extra 3 zeros, calculated the sha256 digest, took the 1st A part of the hexadecimal to transform it to binary, included three zeros into the 8 digits of the binary and acquired 00000010011 which interprets to 19 in https://bookmark-template.com/story22075217/helping-the-others-realize-the-advantages-of-bip39-mnemonic-phrase-tool