I took the index with the words, transformed the variety to binary, included a few zeros, calculated the sha256 digest, took the main Portion of the hexadecimal to convert it to binary, additional 3 zeros for the 8 digits in the binary and received 00000010011 which translates to 19 in https://zbookmarkhub.com/story19747120/the-invalid-bip39-phrase-diaries