I took the index on the words, transformed the variety to binary, additional three zeros, calculated the sha256 digest, took the 1st Component of the hexadecimal to convert it to binary, extra 3 zeros into the eight digits on the binary and acquired 00000010011 which translates to 19 in decimal. https://minibookmarks.com/story19016307/bip39-seed-phrase-fundamentals-explained