C1111233133313231133133313331333133311221123121111113313113313121121121   >>    C111123313331323113313331333133313331122112312111111331311331312112112   <<    C1111233133313231133133313331333133311221123121111113313113313121121123   >>      C1111233133313231133133313331333133311221123121111113313113313121121122   >>