I took the index on the words, converted the number to binary, included 3 zeros, calculated the sha256 digest, took the very first Section of the hexadecimal to convert it to binary, extra 3 zeros towards the eight digits on the binary and got 00000010011 which translates to 19 in https://bookmarkport.com/story22079381/helping-the-others-realize-the-advantages-of-bip39-seed-phrase-mnemonics-generator