I took the index of your words, transformed the amount to binary, additional 3 zeros, calculated the sha256 digest, took the very first Element of the hexadecimal to convert it to binary, extra 3 zeros to your eight digits of your binary and received 00000010011 which translates to 19 in https://bbsocialclub.com/story20724695/bip39-phrase-generator-can-be-fun-for-anyone