I took the index on the words, transformed the amount to binary, extra 3 zeros, calculated the sha256 digest, took the main Portion of the hexadecimal to convert it to binary, extra 3 zeros into the 8 digits of the binary and received 00000010011 which translates to 19 in decimal. https://bookmarksknot.com/story20489888/considerations-to-know-about-bip39-seed-phrase-generator