C1111233133313231133133313331333133313231323331323133313231322123221111   >>    C111123313331323113313331333133313331323132333132313331323132212322111   <<    C1111233133313231133133313331333133313231323331323133313231322123221113   >>      C1111233133313231133133313331333133313231323331323133313231322123221112   >>