I took the index of your words, transformed the number to binary, extra a few zeros, calculated the sha256 digest, took the primary part of the hexadecimal to convert it to binary, added 3 zeros to the 8 digits of your binary and received 00000010011 which interprets to 19 in https://geniusbookmarks.com/story19015223/the-fact-about-bip39-seed-phrase-word-list-that-no-one-is-suggesting