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Select or download this

1 -> @{a, b, c}
2 -> @{d, e, f}
3 -> @{g, h, i}

Select or download this
```
1, a
1, b
...
3, h
3, i
```
Select or download this
```
a, 1
b, 1
...
g, 3
h, 3
i, 3
```