I took the index on the words, transformed the number to binary, extra a few zeros, calculated the sha256 digest, took the very first part of the hexadecimal to convert it to binary, added 3 zeros for the eight digits of the binary and obtained 00000010011 which translates to 19 https://socialdosa.com/story8733309/the-ultimate-guide-to-bip39-seed-phrase-github