MAYBE
Time: 0.000701
TRS:
 {f(x, s s y) -> f(y, x),
    f(s x, y) -> f(x, s s x)}
 DP:
  DP:
   {f#(x, s s y) -> f#(y, x),
      f#(s x, y) -> f#(x, s s x)}
  TRS:
  {f(x, s s y) -> f(y, x),
     f(s x, y) -> f(x, s s x)}
  UR:
   {a(z, w) -> z,
    a(z, w) -> w}
   EDG:
    {(f#(x, s s y) -> f#(y, x), f#(s x, y) -> f#(x, s s x))
     (f#(x, s s y) -> f#(y, x), f#(x, s s y) -> f#(y, x))
     (f#(s x, y) -> f#(x, s s x), f#(x, s s y) -> f#(y, x))
     (f#(s x, y) -> f#(x, s s x), f#(s x, y) -> f#(x, s s x))}
    STATUS:
     arrows: 0.000000
     SCCS (1):
      Scc:
       {f#(x, s s y) -> f#(y, x),
          f#(s x, y) -> f#(x, s s x)}
      
      SCC (2):
       Strict:
        {f#(x, s s y) -> f#(y, x),
           f#(s x, y) -> f#(x, s s x)}
       Weak:
       {f(x, s s y) -> f(y, x),
          f(s x, y) -> f(x, s s x)}
       Open