I took the index from the words, converted the variety to binary, added a few zeros, calculated the sha256 digest, took the initial Element of the hexadecimal to convert it to binary, extra three zeros for the eight digits of the binary and got 00000010011 which translates to 19 in https://bookmarkextent.com/story20725266/new-step-by-step-map-for-bip39-english-words