MAYBE
MAYBE
TRS:
 {
               app(app(mapt(), f), app(leaf(), x)) -> app(leaf(), app(f, x)),
              app(app(mapt(), f), app(node(), xs)) ->
  app(node(), app(app(maptlist(), f), xs)),
  app(app(maptlist(), f), app(app(cons(), x), xs)) ->
  app(app(cons(), app(app(mapt(), f), x)), app(app(maptlist(), f), xs)),
                    app(app(maptlist(), f), nil()) -> nil()
 }
 DUP: We consider a duplicating system.
  Trs:
   {
                 app(app(mapt(), f), app(leaf(), x)) ->
    app(leaf(), app(f, x)),
                app(app(mapt(), f), app(node(), xs)) ->
    app(node(), app(app(maptlist(), f), xs)),
    app(app(maptlist(), f), app(app(cons(), x), xs)) ->
    app(app(cons(), app(app(mapt(), f), x)), app(app(maptlist(), f), xs)),
                      app(app(maptlist(), f), nil()) -> nil()
   }
  Fail