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Your attention is caught by the moving (and possibly living) eyeball above the door. Each time it blinks the pupil is replaced by a different letter of the alphabet, although it doesn't appear to spell anything in particular. You bet that this is some sort of anagram puzzle test and that the door will probably open if you can properly unscramble it.
  1. Elated Ram
  2. Dame Alert
  3. Lame Trade