I took the index in the words, converted the amount to binary, added three zeros, calculated the sha256 digest, took the first Section of the hexadecimal to convert it to binary, included a few zeros into the 8 digits of the binary and got 00000010011 which translates to 19 in https://socialdosa.com/story9480619/the-2-minute-rule-for-bip39-all-words