I took the index from the words, transformed the quantity to binary, included three zeros, calculated the sha256 digest, took the 1st A part of the hexadecimal to transform it to binary, added 3 zeros to the 8 digits with the binary and received 00000010011 which translates to 19 in https://socialwoot.com/story20595484/the-invalid-bip39-phrase-diaries