I took the index from the words, transformed the amount to binary, extra three zeros, calculated the sha256 digest, took the main A part of the hexadecimal to convert it to binary, additional 3 zeros to the eight digits of the binary and acquired 00000010011 which translates to 19 in https://1001bookmarks.com/story18707019/considerations-to-know-about-bip39-word-list-pdf