I took the index with the words, converted the range to binary, included 3 zeros, calculated the sha256 digest, took the very first A part of the hexadecimal to transform it to binary, included a few zeros for the 8 digits from the binary and received 00000010011 which interprets to https://kbookmarking.com/story18785889/bip39-seed-phrase-mnemonics-generator-an-overview