I took the index with the words, transformed the range to binary, included a few zeros, calculated the sha256 digest, took the first A part of the hexadecimal to convert it to binary, included a few zeros to your 8 digits of the binary and received 00000010011 which translates to https://thekiwisocial.com/story4316121/helping-the-others-realize-the-advantages-of-bip39-mnemonic-phrase-tool