I took the index from the words, converted the variety to binary, included three zeros, calculated the sha256 digest, took the 1st Element of the hexadecimal to convert it to binary, added 3 zeros on the 8 digits from the binary and received 00000010011 which interprets to 19 in decimal. https://getsocialpr.com/story19836117/how-much-you-need-to-expect-you-ll-pay-for-a-good-bip39-seed-phrase-mnemonics-generator