I took the index with the words, converted the amount to binary, extra three zeros, calculated the sha256 digest, took the primary A part of the hexadecimal to convert it to binary, added a few zeros into the eight digits in the binary and bought 00000010011 which translates to 19 https://bookmarksfocus.com/story4397712/how-much-you-need-to-expect-you-ll-pay-for-a-good-bip39-definition