MAYBE
219.47/55.40	MAYBE
219.47/55.40	
219.47/55.40	Problem:
219.47/55.40	 a(a(b(b(x1)))) -> b(b(b(a(a(a(x1))))))
219.47/55.40	 a(c(x1)) -> c(a(x1))
219.47/55.40	 c(b(x1)) -> b(c(x1))
219.47/55.40	
219.47/55.40	Proof:
219.47/55.40	 Open
219.47/55.41	EOF