D12121323331322331313232223132313232213231323223313113313233313132312121   >>    D1212132333132233131323222313231323221323132322331311331323331313231212   <<    D12121323331322331313232223132313232213231323223313113313233313132312123   >>      D12121323331322331313232223132313232213231323223313113313233313132312122   >>