I took the index in the words, transformed the number to binary, additional 3 zeros, calculated the sha256 digest, took the 1st part of the hexadecimal to transform it to binary, added three zeros to the 8 digits from the binary and received 00000010011 which translates to 19 in decimal. https://bookmarkingdepot.com/story18747547/invalid-bip39-phrase-things-to-know-before-you-buy