I took the index in the words, converted the range to binary, extra a few zeros, calculated the sha256 digest, took the main Component of the hexadecimal to transform it to binary, extra 3 zeros on the 8 digits in the binary and acquired 00000010011 which interprets to 19 in https://bookmarkquotes.com/story18900746/little-known-facts-about-bip39-words