D12121323331322331313232223132313231323331323232233132322121121   >>    D1212132333132233131323222313231323132333132323223313232212112   <<    D12121323331322331313232223132313231323331323232233132322121123   >>      D12121323331322331313232223132313231323331323232233132322121122   >>