C111123313331323113313331333133313331323132311233133313121212111   >>    C11112331333132311331333133313331333132313231123313331312121211   <<    C111123313331323113313331333133313331323132311233133313121212113   >>      C111123313331323113313331333133313331323132311233133313121212112   >>