[1,2,12,21,112,121,122,211,212,221,1112,1121,1122,
1211,1221,1222,2111,2112,2122,2211,2212,2221,
11112,11121,11122,11211,11212,11221,11222,12111,
12112,12121,12122,12211,12212,12221,12222,21111,
21112,21121,21122,21211,21212,21221,21222,22111,
22112,22121,22122,22211,22212,22221]
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