1, 2, 3, 11, 12, 13, 21, 22, 23, 31, 32, 33, 111, 112, 113, 121, 122, 123, 131, 132, 133, 211, 212, 213, 311, 312, 313, 321, 322, 323, 331, 332, 333, 1121, 1122, 1123, 1221, 1222, 1223, 1231, 1232, 1233, 1311, 1312, 1313, 1321, 1322, 1323, 1331, 1332, 1333, 2111, 2112, 2113, 2121, 2122, 2123, 2131, 2132, 2133, 3111, 3112, 3113, 3121, 3122, 3123, 3131, 3132, 3133, 32111, 3212, 3213, 3221, 3222, 3223, 3231, 3232, 3233, 3311, 3312, 3313, 3321, 3322, 3323, 3331, 3332, 3333, 11221, 11222, 11223, 11231, 11232, 11233, 11321, 11322, 11323, 11331, 11332, 11333, 12121, 12122, 12123