I took the index of the words, converted the selection to binary, extra a few zeros, calculated the sha256 digest, took the 1st Section of the hexadecimal to convert it to binary, added 3 zeros to the 8 digits on the binary and obtained 00000010011 which translates to 19 in https://socialdosa.com/story8685201/the-fact-about-bip39-seed-phrase-word-list-that-no-one-is-suggesting