MAYBE
TRS:
 {f(x, f(a(), a())) -> f(f(f(a(), a()), a()), x)}
 DP:
  Strict:
   {f#(x, f(a(), a())) -> f#(f(f(a(), a()), a()), x),
    f#(x, f(a(), a())) -> f#(f(a(), a()), a())}
  Weak:
  {f(x, f(a(), a())) -> f(f(f(a(), a()), a()), x)}
  EDG:
   {(f#(x, f(a(), a())) -> f#(f(f(a(), a()), a()), x), f#(x, f(a(), a())) -> f#(f(f(a(), a()), a()), x))
    (f#(x, f(a(), a())) -> f#(f(f(a(), a()), a()), x), f#(x, f(a(), a())) -> f#(f(a(), a()), a()))}
   SCCS:
    Scc:
     {f#(x, f(a(), a())) -> f#(f(f(a(), a()), a()), x)}
    SCC:
     Strict:
      {f#(x, f(a(), a())) -> f#(f(f(a(), a()), a()), x)}
     Weak:
     {f(x, f(a(), a())) -> f(f(f(a(), a()), a()), x)}
     Fail