palindromes are words that are spelled the same forward and backwards, like radar. mirror words are pairs of words that are not palindromes themselves, but are mirrors of one another: one is the other spelled backwards. as an example, consider the words eta and ate. these two words are not palindromes themselves but are a pair where one is the other spelled backwards. this is one example of the 218 pairs of three-letter words that are mirrors of each other in yawl.txt. how many total pairs of mirror words are there in yawl.txt?
