MAYBE

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

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