#include <bits/stdc++.h>
using namespace std;
 
int main() {
while(true){
int x, y;
cin >> x >> y;
if(x == 0 && y == 0){
break;
}
cout << min(x, y) << " " << max(x, y) <<endl;

}


}

### Prompt

Please provide a Cpp coded solution to the problem described below:

Write a program which reads two integers x and y, and prints them in ascending order.

Constraints

* 0 ≤ x, y ≤ 10000
* the number of datasets ≤ 3000

Input

The input consists of multiple datasets. Each dataset consists of two integers x and y separated by a single space.

The input ends with two 0 (when both x and y are zero). Your program should not process for these terminal symbols.

Output

For each dataset, print x and y in ascending order in a line. Put a single space between x and y.

Example

Input

3 2
2 2
5 3
0 0


Output

2 3
2 2
3 5

### Response

```cpp
#include <bits/stdc++.h>
using namespace std;
 
int main() {
while(true){
int x, y;
cin >> x >> y;
if(x == 0 && y == 0){
break;
}
cout << min(x, y) << " " << max(x, y) <<endl;

}


}

```