I took the index from the words, transformed the number to binary, extra a few zeros, calculated the sha256 digest, took the initial Element of the hexadecimal to transform it to binary, included three zeros to your 8 digits in the binary and got 00000010011 which translates to 19 in https://singnalsocial.com/story4044745/how-much-you-need-to-expect-you-ll-pay-for-a-good-valid-bip39-seed-phrase