I took the index with the words, converted the range to binary, added three zeros, calculated the sha256 digest, took the initial Component of the hexadecimal to transform it to binary, extra a few zeros for the eight digits from the binary and obtained 00000010011 which interprets to 19 in https://reallivesocial.com/story4359777/how-much-you-need-to-expect-you-ll-pay-for-a-good-bip39-seed-phrase-mnemonics-generator