I took the index with the words, transformed the selection to binary, extra a few zeros, calculated the sha256 digest, took the very first Element of the hexadecimal to transform it to binary, added 3 zeros towards the eight digits from the binary and obtained 00000010011 which translates to 19 https://bookmarkwuzz.com/story18813147/facts-about-bip39-seed-phrase-github-revealed