I took the index with the words, converted the selection to binary, additional a few zeros, calculated the sha256 digest, took the very first Element of the hexadecimal to convert it to binary, included three zeros to your eight digits of your binary and received 00000010011 which translates to 19 https://www.slideserve.com/lewarthbfp/bip39-word-list-explained-your-essential-source-for-creating-secure-purses-in-t