MAYBE
83.10/43.52	MAYBE
83.10/43.52	
83.10/43.52	Problem:
83.10/43.52	 a(x1) -> b(c(x1))
83.10/43.52	 a(a(x1)) -> x1
83.10/43.52	 a(b(b(x1))) -> b(b(a(a(x1))))
83.10/43.52	
83.10/43.52	Proof:
83.10/43.52	 Open
83.10/43.52	EOF