I took the index of the words, converted the range to binary, additional a few zeros, calculated the sha256 digest, took the first Section of the hexadecimal to transform it to binary, additional 3 zeros to the 8 digits with the binary and got 00000010011 which translates to 19 in https://hindibookmark.com/story20519132/not-known-facts-about-bip39-english-words