I took the index with the words, converted the range to binary, additional 3 zeros, calculated the sha256 digest, took the primary Section of the hexadecimal to transform it to binary, included three zeros to your 8 digits of your binary and received 00000010011 which interprets to 19 in decimal. https://ezmarkbookmarks.com/story19130363/the-invalid-bip39-phrase-diaries