I took the index of your words, transformed the variety to binary, extra 3 zeros, calculated the sha256 digest, took the main part of the hexadecimal to transform it to binary, additional three zeros on the eight digits from the binary and obtained 00000010011 which interprets to 19 in decimal. https://onelifesocial.com/story4980890/how-much-you-need-to-expect-you-ll-pay-for-a-good-valid-bip39-seed-phrase