C31231211111133131211113313331333133313331323223313113313232211   >>    C3123121111113313121111331333133313331333132322331311331323221   <<    C31231211111133131211113313331333133313331323223313113313232213   >>      C31231211111133131211113313331333133313331323223313113313232212   >>