C111123313331323113313331333133313331323132333133313331312313233313231323112121   >>    C11112331333132311331333133313331333132313233313331333131231323331323132311212   <<    C111123313331323113313331333133313331323132333133313331312313233313231323112123   >>      C111123313331323113313331333133313331323132333133313331312313233313231323112122   >>