I took the index of your words, transformed the amount to binary, added a few zeros, calculated the sha256 digest, took the primary Section of the hexadecimal to convert it to binary, additional 3 zeros to the eight digits from the binary and received 00000010011 which translates to 19 in https://bookmarkingbay.com/story18848593/new-step-by-step-map-for-bip39-english-words