I took the index in the words, transformed the number to binary, included 3 zeros, calculated the sha256 digest, took the initial Portion of the hexadecimal to convert it to binary, included three zeros on the 8 digits from the binary and acquired 00000010011 which translates to 19 in decimal. https://classifylist.com/story20703314/considerations-to-know-about-bip39-word-list-pdf