I took the index from the words, transformed the number to binary, added three zeros, calculated the sha256 digest, took the initial Section of the hexadecimal to convert it to binary, added three zeros on the eight digits in the binary and bought 00000010011 which interprets to 19 in decimal. https://esocialmall.com/story4196273/how-much-you-need-to-expect-you-ll-pay-for-a-good-bip39-definition