C111123313331323113313331323133313331311331311331333133312113312121   >>    C11112331333132311331333132313331333131133131133133313331211331212   <<    C111123313331323113313331323133313331311331311331333133312113312123   >>      C111123313331323113313331323133313331311331311331333133312113312122   >>