C1111233133313231133133313331333133311221123121111331322331311323111   >>    C111123313331323113313331333133313331122112312111133132233131132311   <<    C1111233133313231133133313331333133311221123121111331322331311323113   >>      C1111233133313231133133313331333133311221123121111331322331311323112   >>