I took the index of the words, transformed the range to binary, additional three zeros, calculated the sha256 digest, took the main Section of the hexadecimal to transform it to binary, extra 3 zeros to the eight digits in the binary and got 00000010011 which translates to 19 in decimal. https://socialmediainuk.com/story20874998/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator