I took the index in the words, transformed the selection to binary, additional three zeros, calculated the sha256 digest, took the 1st Portion of the hexadecimal to transform it to binary, extra a few zeros for the 8 digits with the binary and acquired 00000010011 which interprets to 19 in https://atozbookmark.com/story18832358/not-known-factual-statements-about-bip39-explained