I took the index of the words, converted the range to binary, added three zeros, calculated the sha256 digest, took the primary A part of the hexadecimal to convert it to binary, added three zeros to your eight digits from the binary and obtained 00000010011 which interprets to 19 in https://tvsocialnews.com/story4528635/bip39-seed-phrase-mnemonics-generator-an-overview