C1111233133313231133133313331333133311221123121111113313232111211   >>    C111123313331323113313331333133313331122112312111111331323211121   <<    C1111233133313231133133313331333133311221123121111113313232111213   >>      C1111233133313231133133313331333133311221123121111113313232111212   >>