D1313331313132313132333132323213231323132321133132233132312121121   >>    D131333131313231313233313232321323132313232113313223313231212112   <<    D1313331313132313132333132323213231323132321133132233132312121123   >>      D1313331313132313132333132323213231323132321133132233132312121122   >>