I took the index on the words, transformed the amount to binary, included 3 zeros, calculated the sha256 digest, took the primary Section of the hexadecimal to convert it to binary, included 3 zeros to the 8 digits from the binary and bought 00000010011 which interprets to 19 in decimal. https://exactlybookmarks.com/story18945040/a-review-of-bip39