197.59/50.57	MAYBE
197.59/50.57	
197.59/50.57	Problem:
197.59/50.57	 a(c(b(b(x1)))) -> b(b(b(c(x1))))
197.59/50.57	 b(b(c(x1))) -> b(a(b(b(x1))))
197.59/50.57	 c(a(a(a(x1)))) -> a(c(x1))
197.59/50.57	 b(b(b(x1))) -> c(b(a(c(x1))))
197.59/50.57	
197.59/50.57	Proof:
197.59/50.57	 Open
197.59/50.57	EOF