Problem:
 Ap(Ap(Ap(S(),x),y),z) -> Ap(Ap(x,z),Ap(y,z))
 Ap(Ap(K(),x),y) -> x
 Ap(I(),x) -> x

Proof:
 Church Rosser Transformation Processor:
  
  strict:
   
  weak:
   
  critical peaks: 0
  Qed