Problem:
 a() -> b()
 f(a()) -> g(a())
 f(b()) -> g(b())

Proof:
 Uncurry Processor:
  a() -> b()
  f4(f(),a()) -> f4(g(),a())
  f4(f(),b()) -> f4(g(),b())
  Church Rosser Transformation Processor:
   
   strict:
    
   weak:
    
   critical peaks: 0
   Qed