I took the index in the words, converted the amount to binary, extra a few zeros, calculated the sha256 digest, took the first A part of the hexadecimal to convert it to binary, extra 3 zeros on the 8 digits from the binary and got 00000010011 which interprets to 19 https://wavesocialmedia.com/story4407997/little-known-facts-about-bip39-words