I took the index of the words, transformed the number to binary, additional three zeros, calculated the sha256 digest, took the 1st A part of the hexadecimal to transform it to binary, added three zeros for the eight digits in the binary and obtained 00000010011 which translates to 19 in https://guidemysocial.com/story4428624/helping-the-others-realize-the-advantages-of-bip39-seed-phrase-mnemonics-generator