[0,1,10,2,100,11,20,3,1000,101,110,12,200,21,30,4, 10000,1001,1010,102,1100,111,120,13,2000,201,210, 22,300,31,40,5,100000,10001,10010,1002,10100,1011, 1020,103,11000,1101,1110,112,1200,121,130,14, 20000,2001,2010]