D121213233313223313132322231323132313331323132233132313113313231231211   >>    D12121323331322331313232223132313231333132313223313231311331323123121   <<    D121213233313223313132322231323132313331323132233132313113313231231213   >>      D121213233313223313132322231323132313331323132233132313113313231231212   >>