D12121323331313331312313231323223313232211233132313112211211231   >>    D1212132333131333131231323132322331323221123313231311221121123   <<    D12121323331313331312313231323223313232211233132313112211211233   >>      D12121323331313331312313231323223313232211233132313112211211232   >>