I took the index from the words, converted the amount to binary, additional a few zeros, calculated the sha256 digest, took the first A part of the hexadecimal to convert it to binary, added three zeros to the 8 digits from the binary and received 00000010011 which translates to 19 https://bookmarkinglog.com/story18800868/considerations-to-know-about-bip39-word-list-pdf