I took the index on the words, transformed the range to binary, included a few zeros, calculated the sha256 digest, took the first A part of the hexadecimal to convert it to binary, additional 3 zeros on the eight digits with the binary and obtained 00000010011 which translates to 19 https://todaybookmarks.com/story18930825/how-much-you-need-to-expect-you-ll-pay-for-a-good-valid-bip39-seed-phrase