196.21/50.19	MAYBE
196.21/50.19	
196.21/50.19	Problem:
196.21/50.19	 a(x1) -> x1
196.21/50.19	 a(b(b(a(x1)))) -> a(a(b(a(b(b(x1))))))
196.21/50.19	
196.21/50.19	Proof:
196.21/50.19	 Open
196.21/50.19	EOF