I took the index from the words, transformed the selection to binary, added three zeros, calculated the sha256 digest, took the first Element of the hexadecimal to transform it to binary, included 3 zeros for the eight digits on the binary and obtained 00000010011 which interprets to 19 in decimal. https://dirstop.com/story21855787/how-much-you-need-to-expect-you-ll-pay-for-a-good-valid-bip39-seed-phrase