201, 2001, 2011, 2201, 20001, 20011, 20111, 22001, 22011, 22201, 200001, 200011, 200111, 201111, 220001, 220011, 220111, 222001, 222011, 222201, 2000001, 2000011, 2000111, 2001111, 2011111, 2200001, 2200011, 2200111, 2201111, 2220001, 2220011, 2220111