C1111233133313231133133313331333133311221123121111121111121233131   >>    C111123313331323113313331333133313331122112312111112111112123313   <<    C1111233133313231133133313331333133311221123121111121111121233133   >>      C1111233133313231133133313331333133311221123121111121111121233132   >>