084 pairs
11, 12, 21, 22, 31, 32, 41, 42
99, 90, 91, 94, 95, 96

singles
132, 142, 231, 241, 291, 312, 321, 341, 342, 391, 412, 421, 431, 432, 491, 901, 904, 905, 906, 910, 912, 914, 915, 916, 921, 931, 940, 941, 942, 945, 946, 950, 951, 954, 956, 960, 961, 964, 965

doubles
111 112 122 211 221 222 311 331 322 332 411 441 422 442
999 990 900 911 991 944 994 955 995 966 996