I took the index of the words, converted the selection to binary, included a few zeros, calculated the sha256 digest, took the main part of the hexadecimal to convert it to binary, extra 3 zeros for the 8 digits on the binary and received 00000010011 which translates to 19 in https://fellowfavorite.com/story19979186/helping-the-others-realize-the-advantages-of-bip39-seed-phrase-mnemonics-generator