I took the index on the words, converted the range to binary, added 3 zeros, calculated the sha256 digest, took the main part of the hexadecimal to convert it to binary, added a few zeros to your eight digits of your binary and obtained 00000010011 which interprets to 19 in https://bookmarkinginfo.com/story18776229/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator