I took the index on the words, transformed the amount to binary, additional three zeros, calculated the sha256 digest, took the 1st Portion of the hexadecimal to convert it to binary, extra 3 zeros into the eight digits of the binary and obtained 00000010011 which translates to 19 in decimal. https://bookmarkloves.com/story21627504/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator