C11112331333132311331333133313331333132313231123313232211212111   >>    C1111233133313231133133313331333133313231323112331323221121211   <<    C11112331333132311331333133313331333132313231123313232211212113   >>      C11112331333132311331333133313331333132313231123313232211212112   >>