I took the index in the words, transformed the variety to binary, additional 3 zeros, calculated the sha256 digest, took the very first Element of the hexadecimal to convert it to binary, added 3 zeros into the eight digits of your binary and acquired 00000010011 which interprets to 19 in https://ok-social.com/story4340740/top-guidelines-of-bip39-word-list-pdf