I took the index from the words, converted the range to binary, included a few zeros, calculated the sha256 digest, took the primary Portion of the hexadecimal to transform it to binary, extra 3 zeros on the 8 digits on the binary and bought 00000010011 which interprets to 19 in https://gatherbookmarks.com/story19572694/the-invalid-bip39-phrase-diaries