MAYBE
220.13/55.60	MAYBE
220.13/55.60	
220.13/55.60	Problem:
220.13/55.60	 a(a(a(b(x1)))) -> b(a(a(a(x1))))
220.13/55.60	 b(a(b(a(x1)))) -> a(b(b(a(x1))))
220.13/55.60	
220.13/55.60	Proof:
220.13/55.60	 Open
220.13/55.61	EOF