I took the index with the words, converted the number to binary, extra a few zeros, calculated the sha256 digest, took the initial part of the hexadecimal to convert it to binary, extra three zeros into the eight digits with the binary and obtained 00000010011 which translates to 19 in https://ilovebookmarking.com/story18848540/the-2-minute-rule-for-bip39-all-words