I took the index on the words, transformed the number to binary, extra three zeros, calculated the sha256 digest, took the main Portion of the hexadecimal to convert it to binary, additional three zeros towards the 8 digits of your binary and acquired 00000010011 which translates to 19 in decimal. https://bookmarkwuzz.com/story18822328/an-unbiased-view-of-bip39-seed-phrase-github