I took the index in the words, transformed the range to binary, extra 3 zeros, calculated the sha256 digest, took the 1st A part of the hexadecimal to convert it to binary, added a few zeros to the 8 digits from the binary and obtained 00000010011 which translates to 19 https://admiralbookmarks.com/story18832418/top-guidelines-of-bip39-word-list-pdf