I took the index in the words, transformed the quantity to binary, additional a few zeros, calculated the sha256 digest, took the initial Portion of the hexadecimal to transform it to binary, added a few zeros to the 8 digits with the binary and received 00000010011 which translates to 19 https://bookmarkangaroo.com/story19100056/5-essential-elements-for-bip39-explained