PLEASE IT HAS TO BE EXPLAINED IN STEPS AND FULL DETAILS PLEASE. Also it should in DIMACS and cnf format.

There are three people: Stihl, Moller and Einstein. It is known that exactly one of them is Russian, while the other two are Germans. Moreover, every Russian must be a spy. When Stihl meets Moller in a corridor, he makes the following joke: you know, Moller, you are as German as I am Russian. It is known that Stihl always tells the truth when he is joking. We aim to establish that Einstein is not a Russian spy by using your SAT-solver. Use propositional variables from the Cartesian product of {Stihl, Moller, Einstein } and {Russian, German, Spy}, e.g. Einstein-Spy is true iff Einstein is a spy. Write out a propositional encoding for this problem justifying your constructed clauses. Make a DIMACS format instance and run it through your SAT-solver.