MAYBE
229.04/57.27	MAYBE
229.04/57.27	
229.04/57.27	Problem:
229.04/57.27	 b(d(b(x1))) -> c(d(b(x1)))
229.04/57.27	 b(a(c(x1))) -> b(c(x1))
229.04/57.27	 a(d(x1)) -> d(c(x1))
229.04/57.27	 b(b(b(x1))) -> a(b(c(x1)))
229.04/57.27	 d(c(x1)) -> b(d(x1))
229.04/57.27	 d(c(x1)) -> d(b(d(x1)))
229.04/57.27	 d(a(c(x1))) -> b(b(x1))
229.04/57.27	
229.04/57.27	Proof:
229.04/57.27	 Open
229.04/57.28	EOF