enumerative combinatorics

Hi, can anybody please help me or analyse this question for me please? I really have no idea how to even approach it. It says: Derive the exponential generating function (egf) for permutations having an even number of cycles and that of permutations having an odd number of cycles. There should show that for $\displaystyle n \geq 2$ there are as many permutations with an even number of cycles as those having an odd number of cycles. Define a bijection which demonstrates this and illustrate it with an example. Can anybody please give me some suggestions please? I can't even get the question make sense to me.