D21221323131123313112211231333132322133313133313232211233132333132312312121   >>    D2122132313112331311221123133313232213331313331323221123313233313231231212   <<    D21221323131123313112211231333132322133313133313232211233132333132312312123   >>      D21221323131123313112211231333132322133313133313232211233132333132312312122   >>