D2311231323331322331313232233132313231323221133132333132311211311   >>    D231123132333132233131323223313231323132322113313233313231121131   <<    D2311231323331322331313232233132313231323221133132333132311211313   >>      D2311231323331322331313232233132313231323221133132333132311211312   >>