PROGRAMMING:Sort the three numbers from small to large

Input three integers, sort and output from small to large
###Input format:
1 2 3
###Output format:
1,2,3
###Input example:
Here is a set of inputs. For example:
```in
1 2 3
```
###Output example:
The corresponding output is given here. For example:
```out
1,2,3
```







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Using function sort to realize function