I took the index from the words, transformed the number to binary, additional three zeros, calculated the sha256 digest, took the very first Component of the hexadecimal to convert it to binary, additional a few zeros towards the 8 digits from the binary and obtained 00000010011 which interprets to 19 https://nimmansocial.com/story9398958/considerations-to-know-about-bip39-word-list-pdf