I took the index on the words, transformed the variety to binary, extra 3 zeros, calculated the sha256 digest, took the main part of the hexadecimal to transform it to binary, added a few zeros to the 8 digits of the binary and obtained 00000010011 which translates to 19 in https://tvsocialnews.com/story4340536/top-guidelines-of-bip39-word-list-pdf