I took the index from the words, transformed the range to binary, additional a few zeros, calculated the sha256 digest, took the 1st Portion of the hexadecimal to convert it to binary, additional three zeros to your eight digits of your binary and acquired 00000010011 which translates to 19 in https://bookmarkinglive.com/story19838825/top-guidelines-of-bip39-word-list-pdf