I took the index on the words, converted the variety to binary, included a few zeros, calculated the sha256 digest, took the 1st Element of the hexadecimal to transform it to binary, extra 3 zeros to the eight digits of the binary and got 00000010011 which interprets to 19 in https://bookmarkingdelta.com/story18819922/considerations-to-know-about-bip39-word-list-pdf