I took the index of your words, converted the selection to binary, added 3 zeros, calculated the sha256 digest, took the primary Element of the hexadecimal to transform it to binary, extra a few zeros on the 8 digits from the binary and received 00000010011 which translates to 19 in https://bookmarkdistrict.com/story18590116/fascination-about-invalid-bip39-phrase