I took the index of the words, converted the selection to binary, additional 3 zeros, calculated the sha256 digest, took the first Portion of the hexadecimal to transform it to binary, additional a few zeros to the 8 digits of your binary and received 00000010011 which interprets to 19 in https://peakbookmarks.com/story18929860/considerations-to-know-about-bip39-word-list-pdf