[0,1,2,20,21,22,210,211,212,2100,2101,2102,2120,2121,2122,21010,21011,21012,21200,21201,21202,21220,21221,21222,210110,210111,210112,212000,212001,212002,212020,212021,212022,212210,212211,212212,2101100,2101101]