I took the index from the words, converted the quantity to binary, added 3 zeros, calculated the sha256 digest, took the initial Portion of the hexadecimal to transform it to binary, added a few zeros to the 8 digits in the binary and obtained 00000010011 which interprets to 19 in https://bookmarkspiral.com/story18981656/fascination-about-invalid-bip39-phrase