I took the index on the words, converted the amount to binary, extra 3 zeros, calculated the sha256 digest, took the first Section of the hexadecimal to transform it to binary, included a few zeros to the 8 digits on the binary and got 00000010011 which interprets to 19 in https://moodjhomedia.com/story2565894/the-invalid-bip39-phrase-diaries