I took the index on the words, transformed the selection to binary, additional three zeros, calculated the sha256 digest, took the 1st Portion of the hexadecimal to convert it to binary, included 3 zeros on the 8 digits of the binary and received 00000010011 which translates to 19 in decimal. https://socialimarketing.com/story4326369/how-much-you-need-to-expect-you-ll-pay-for-a-good-valid-bip39-seed-phrase