I took the index with the words, converted the range to binary, included three zeros, calculated the sha256 digest, took the main A part of the hexadecimal to convert it to binary, extra a few zeros towards the 8 digits in the binary and obtained 00000010011 which interprets to 19 https://dftsocial.com/story19699795/facts-about-bip39-seed-phrase-github-revealed