MAYBE

Problem:
 f(f(a(),x),y) -> f(f(x,f(a(),y)),a())

Proof:
 DP Processor:
  DPs:
   f#(f(a(),x),y) -> f#(a(),y)
   f#(f(a(),x),y) -> f#(x,f(a(),y))
   f#(f(a(),x),y) -> f#(f(x,f(a(),y)),a())
  TRS:
   f(f(a(),x),y) -> f(f(x,f(a(),y)),a())
  Open