I took the index on the words, transformed the quantity to binary, extra a few zeros, calculated the sha256 digest, took the very first Component of the hexadecimal to convert it to binary, included three zeros on the eight digits from the binary and obtained 00000010011 which translates to 19 https://getsocialselling.com/story4398068/facts-about-bip39-seed-phrase-word-list-revealed