11, 21, 22, 31, 33, 41, 42, 44, 51, 55, 61, 62, 63, 66, 71, 77, 81, 82, 84, 88, 91, 93, 99, 101, 201, 202, 301, 303, 401, 402, 404, 501, 505, 601, 602, 603, 606, 612, 701, 707, 801, 802, 804, 808, 816, 901, 903, 909, 945, 1001, 1003, 1011, 2001, 2002, 2003