C1111233131211111211113313331333133313331312331333132233132323131232121   >>    C111123313121111121111331333133313331333131233133313223313232313123212   <<    C1111233131211111211113313331333133313331312331333132233132323131232123   >>      C1111233131211111211113313331333133313331312331333132233132323131232122   >>