197.58/50.55	MAYBE
197.58/50.55	
197.58/50.55	Problem:
197.58/50.55	 b(a(b(b(x1)))) -> b(b(b(b(x1))))
197.58/50.55	 b(a(a(b(x1)))) -> a(b(a(a(x1))))
197.58/50.55	 a(a(a(a(x1)))) -> b(b(b(a(x1))))
197.58/50.55	
197.58/50.55	Proof:
197.58/50.55	 Open
197.58/50.56	EOF