I took the index of the words, converted the number to binary, additional three zeros, calculated the sha256 digest, took the first Portion of the hexadecimal to transform it to binary, included three zeros to your 8 digits in the binary and acquired 00000010011 which interprets to 19 in decimal. https://remingtonnjdi433.wordpress.com/2025/01/17/opening-the-world-of-bip39-a-comprehensive-overview-to-mnemonic-expressions-and-word-lists/