I took the index in the words, converted the variety to binary, extra a few zeros, calculated the sha256 digest, took the primary Section of the hexadecimal to convert it to binary, included 3 zeros to your eight digits from the binary and got 00000010011 which interprets to 19 in https://bookmarkingbay.com/story18942546/invalid-bip39-phrase-things-to-know-before-you-buy