What is every combination of a 4-digit number using the numbers 1234567890?

There are 210 of them and they are:0123, 0124, 0125, 0126, 0127, 0128, 0129, 0134, 0135, 0136,

0137, 0138, 0139, 0145, 0146, 0147, 0148, 0149, 0156, 0157,

0158, 0159, 0167, 0168, 0169, 0178, 0179, 0189, 0234, 0235,

0236, 0237, 0238, 0239, 0245, 0246, 0247, 0248, 0249, 0256,

0257, 0258, 0259, 0267, 0268, 0269, 0278, 0279, 0289, 0345,

0346. 0347, 0348, 0349, 0356, 0357, 0358, 0359, 0367 ,0368,

0369, 0378, 0379, 0389, 0456, 0457, 0458, 0459, 0467, 0468,

0469, 0478, 0479, 0489, 0567, 0568, 0569, 0578, 0579, 0589,

0678, 0679, 0689, 0789, 1234, 1235, 1236, 1237, 1238, 1239,

1245, 1246, 1247, 1248, 1249, 1256, 1257, 1258, 1259, 1267,

1268, 1269, 1278, 1279, 1289, 1345, 1346, 1347, 1348, 1349,

1356, 1357, 1358, 1359, 1367, 1368, 1369, 1378, 1379, 1389,

1456, 1457, 1458, 1459, 1467, 1468, 1469, 1478, 1479, 1489,

1567, 1568, 1569, 1578, 1579, 1589, 1678, 1679, 1689, 1789,

2345, 2346, 2347, 2348, 2349, 2356, 2357, 2358, 2359, 2367,

2368, 2369, 2378, 2379, 2389, 2456, 2457, 2458, 2459, 2467,

2468, 2469, 2478, 2479, 2489, 2567, 2568, 2569, 2578, 2579,

2589, 2678, 2679, 2689, 2789, 3456, 3457, 3458, 3459, 3467,

3468, 3469, 3478, 3479, 3489, 3567, 3568, 3569, 3578, 3579,

3589, 3678, 3679, 3689, 3789, 4567, 4568, 4569, 4578, 4579,

4589, 4678, 4679, 4689, 4789, 5678 ,5679, 5689, 5789 and 6789.