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