I took the index of your words, transformed the selection to binary, additional 3 zeros, calculated the sha256 digest, took the main Portion of the hexadecimal to convert it to binary, additional three zeros towards the 8 digits in the binary and received 00000010011 which translates to 19 in decimal. https://bookmarkfly.com/story18851319/the-fact-about-valid-bip39-seed-phrase-that-no-one-is-suggesting