I took the index of the words, converted the selection to binary, included three zeros, calculated the sha256 digest, took the primary Portion of the hexadecimal to convert it to binary, additional a few zeros to the 8 digits from the binary and got 00000010011 which interprets to 19 in https://getsocialpr.com/story19831992/facts-about-bip39-seed-phrase-word-list-revealed