I took the index with the words, converted the range to binary, added 3 zeros, calculated the sha256 digest, took the initial Element of the hexadecimal to convert it to binary, added 3 zeros into the 8 digits in the binary and bought 00000010011 which interprets to 19 in decimal. https://thebookmarkplaza.com/story19399618/the-invalid-bip39-phrase-diaries