979 pairs
00, 01, 10, 11, 20, 21, 30, 31
88, 89, 80, 83, 84, 85

singles

021, 031, 120, 130, 180, 201, 210, 230, 231, 280, 301, 310, 320, 321, 380, 801, 803, 804, 805, 809, 810, 820, 830, 831, 834, 835, 839, 840, 843, 845, 849, 850, 853, 854, 859, 890, 893, 894, 895

doubles
000 001 011 100 110 111 200 220 211 221 300 330 311 331
888 899 889 800 880 833 883 844 884 855 885