196.43/50.30	MAYBE
196.43/50.30	
196.43/50.30	Problem:
196.43/50.30	 a(a(a(a(x1)))) -> a(b(a(b(x1))))
196.43/50.30	 b(a(b(x1))) -> a(b(a(x1)))
196.43/50.30	
196.43/50.30	Proof:
196.43/50.30	 Open
196.43/50.31	EOF