C111123313331323113313331333133313331323132333133313331333131133133313332312121   >>    C11112331333132311331333133313331333132313233313331333133313113313331333231212   <<    C111123313331323113313331333133313331323132333133313331333131133133313332312123   >>      C111123313331323113313331333133313331323132333133313331333131133133313332312122   >>