D2311231323331322331313232233132322331311221123231323132322112111   >>    D231123132333132233131323223313232233131122112323132313232211211   <<    D2311231323331322331313232233132322331311221123231323132322112113   >>      D2311231323331322331313232233132322331311221123231323132322112112   >>