I took the index from the words, converted the number to binary, added a few zeros, calculated the sha256 digest, took the primary Portion of the hexadecimal to transform it to binary, added 3 zeros for the eight digits with the binary and received 00000010011 which interprets to 19 in https://livebookmarking.com/story19125629/5-essential-elements-for-bip39-explained