I took the index of the words, converted the number to binary, added 3 zeros, calculated the sha256 digest, took the very first Component of the hexadecimal to convert it to binary, included 3 zeros into the eight digits of the binary and got 00000010011 which interprets to 19 in https://bookmarkswing.com/story20358395/the-fact-about-valid-bip39-seed-phrase-that-no-one-is-suggesting