I took the index on the words, converted the quantity to binary, included 3 zeros, calculated the sha256 digest, took the very first A part of the hexadecimal to convert it to binary, added 3 zeros for the eight digits of your binary and got 00000010011 which translates to 19 https://hotbookmarkings.com/story18832690/not-known-factual-statements-about-bip39-explained