I took the index on the words, transformed the amount to binary, included three zeros, calculated the sha256 digest, took the initial A part of the hexadecimal to convert it to binary, additional three zeros to the 8 digits in the binary and obtained 00000010011 which translates to 19 in https://getsocialpr.com/story20022290/how-much-you-need-to-expect-you-ll-pay-for-a-good-valid-bip39-seed-phrase