D12121323331322331313232223132313232213231323223313132313311231   >>    D1212132333132233131323222313231323221323132322331313231331123   <<    D12121323331322331313232223132313232213231323223313132313311233   >>      D12121323331322331313232223132313232213231323223313132313311232   >>