I took the index of your words, converted the quantity to binary, included three zeros, calculated the sha256 digest, took the 1st Component of the hexadecimal to convert it to binary, extra a few zeros for the 8 digits with the binary and got 00000010011 which interprets to 19 in https://hotbookmarkings.com/story19046459/the-invalid-bip39-phrase-diaries