MAYBE
147.55/55.47	MAYBE
147.55/55.47	
147.55/55.47	Problem:
147.55/55.47	 a(a(x1)) -> a(b(b(b(x1))))
147.55/55.47	 b(a(x1)) -> b(b(c(x1)))
147.55/55.47	 a(b(b(c(x1)))) -> a(a(a(b(x1))))
147.55/55.47	
147.55/55.47	Proof:
147.55/55.47	 Open
147.55/55.47	EOF