I took the index of your words, transformed the selection to binary, extra three zeros, calculated the sha256 digest, took the main Section of the hexadecimal to transform it to binary, extra a few zeros for the eight digits in the binary and got 00000010011 which translates to 19 in https://monobookmarks.com/story18719265/the-fact-about-valid-bip39-seed-phrase-that-no-one-is-suggesting