D2311231323331322331313232233132313231313231313331323132322112121   >>    D231123132333132233131323223313231323131323131333132313232211212   <<    D2311231323331322331313232233132313231313231313331323132322112123   >>      D2311231323331322331313232233132313231313231313331323132322112122   >>