Nini found a dusty old treasure chest hidden in her attic. She does not know the password, however she does know that the password is a four-digit even number consisting of the digits $$1$$, $$2$$, $$3$$, and $$4$$, and that digits cannot be repeated. How many different ways can she guess the password? 
Overseas Competition->Knowledge Point->Counting Modules->Law of Addition and Multiplication->Complex Forming Numbers Overseas Competition->Knowledge Point->Counting Modules->Permutations and Combinations->Combinations