I took the index of the words, transformed the selection to binary, extra 3 zeros, calculated the sha256 digest, took the main part of the hexadecimal to convert it to binary, additional three zeros for the 8 digits with the binary and got 00000010011 which translates to 19 in decimal. https://bookmarkstime.com/story19218282/how-much-you-need-to-expect-you-ll-pay-for-a-good-bip39-seed-phrase-mnemonics-generator