C11112331333132311331333133313331333132313231123313232211212121   >>    C1111233133313231133133313331333133313231323112331323221121212   <<    C11112331333132311331333133313331333132313231123313232211212123   >>      C11112331333132311331333133313331333132313231123313232211212122   >>