I took the index with the words, transformed the range to binary, added 3 zeros, calculated the sha256 digest, took the initial Component of the hexadecimal to transform it to binary, extra 3 zeros towards the eight digits in the binary and received 00000010011 which translates to 19 in decimal. https://bookmarkssocial.com/story18891805/how-much-you-need-to-expect-you-ll-pay-for-a-good-bip39-definition