I took the index in the words, converted the range to binary, additional 3 zeros, calculated the sha256 digest, took the first Component of the hexadecimal to transform it to binary, additional 3 zeros to the 8 digits in the binary and obtained 00000010011 which interprets to 19 in decimal. https://fatallisto.com/story8790512/how-much-you-need-to-expect-you-ll-pay-for-a-good-bip39-definition