I took the index of your words, converted the amount to binary, additional three zeros, calculated the sha256 digest, took the very first Portion of the hexadecimal to convert it to binary, added 3 zeros on the 8 digits of the binary and received 00000010011 which interprets to 19 in https://bookmarklogin.com/story18920590/considerations-to-know-about-bip39-word-list-pdf