MAYBE
106.88/41.92	MAYBE
106.88/41.92	
106.88/41.92	Problem:
106.88/41.92	 b(b(x1)) -> a(a(a(x1)))
106.88/41.92	 a(a(b(x1))) -> b(x1)
106.88/41.92	 a(b(a(x1))) -> a(b(b(x1)))
106.88/41.92	
106.88/41.92	Proof:
106.88/41.92	 Open
106.88/41.92	EOF