I took the index of your words, converted the variety to binary, added a few zeros, calculated the sha256 digest, took the 1st Portion of the hexadecimal to convert it to binary, extra 3 zeros on the eight digits on the binary and acquired 00000010011 which translates to 19 in https://bookmarkoffire.com/story18949103/considerations-to-know-about-bip39-seed-phrase-generator