D12121323331313331312313231323132313223313233313221333131323221121   >>    D1212132333131333131231323132313231322331323331322133313132322112   <<    D12121323331313331312313231323132313223313233313221333131323221123   >>      D12121323331313331312313231323132313223313233313221333131323221122   >>