I took the index on the words, transformed the quantity to binary, additional three zeros, calculated the sha256 digest, took the initial Section of the hexadecimal to convert it to binary, included three zeros into the 8 digits of your binary and obtained 00000010011 which interprets to 19 in decimal. https://geilebookmarks.com/story18801715/facts-about-bip39-seed-phrase-word-list-revealed