I took the index in the words, transformed the amount to binary, included three zeros, calculated the sha256 digest, took the initial Component of the hexadecimal to transform it to binary, additional 3 zeros to the 8 digits with the binary and got 00000010011 which interprets to 19 in decimal. https://yxzbookmarks.com/story19459617/considerations-to-know-about-bip39-seed-phrase-generator