[0,1,2,10,11,12,20,100,101,102,110,111,112,120, 200,1000,1001,1002,1010,1011,1012,1020,1100,1101, 1102,1110,1111,1112,1120,1200,2000,10000,10001, 10002,10010,10011,10012,10020,10100,10101,10102, 10110]