MAYBE
219.05/55.36	MAYBE
219.05/55.36	
219.05/55.36	Problem:
219.05/55.36	 a(a(a(x1))) -> a(b(c(c(c(x1)))))
219.05/55.36	 c(b(x1)) -> b(a(x1))
219.05/55.36	
219.05/55.36	Proof:
219.05/55.36	 Open
219.05/55.36	EOF