197.37/50.51	MAYBE
197.37/50.51	
197.37/50.51	Problem:
197.37/50.51	 R(b(x1)) -> b(R(x1))
197.37/50.51	 R(c(x1)) -> L(c(x1))
197.37/50.51	 b(L(x1)) -> L(b(x1))
197.37/50.51	 a(L(x1)) -> a(b(R(x1)))
197.37/50.51	
197.37/50.51	Proof:
197.37/50.51	 Open
197.37/50.51	EOF