D12121323331322331313232223132313231311221123223313233313311212121   >>    D1212132333132233131323222313231323131122112322331323331331121212   <<    D12121323331322331313232223132313231311221123223313233313311212123   >>      D12121323331322331313232223132313231311221123223313233313311212122   >>