197.18/50.51	MAYBE
197.18/50.51	
197.18/50.51	Problem:
197.18/50.51	 a(a(b(a(x1)))) -> a(a(b(b(x1))))
197.18/50.51	 b(b(b(b(x1)))) -> b(a(b(a(x1))))
197.18/50.51	 a(b(a(a(x1)))) -> a(a(a(b(x1))))
197.18/50.51	 b(a(b(b(x1)))) -> a(b(a(a(x1))))
197.18/50.51	
197.18/50.51	Proof:
197.18/50.51	 Open
197.48/50.52	EOF