MAYBE
41.89/11.98	MAYBE
41.89/11.98	
41.89/11.98	Problem:
41.89/11.98	 a(x1) -> x1
41.89/11.98	 a(b(b(x1))) -> b(b(b(c(a(a(x1))))))
41.89/11.98	 b(c(x1)) -> x1
41.89/11.98	
41.89/11.98	Proof:
41.89/11.98	 Open
41.89/11.98	EOF