I took the index on the words, transformed the amount to binary, extra a few zeros, calculated the sha256 digest, took the 1st part of the hexadecimal to convert it to binary, added three zeros towards the 8 digits of the binary and received 00000010011 which interprets to 19 in https://meshbookmarks.com/story18963426/little-known-facts-about-bip39-words