#include <iostream>
using namespace std;

int main(){
    int x, y;
    cin >> x >> y;
    if(x+y==0) return 0;
    cout << min(x,y) << ' ' << max(x, y) << endl;
    main();
}

### Prompt

Your task is to create a cpp solution to the following problem:

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 <iostream>
using namespace std;

int main(){
    int x, y;
    cin >> x >> y;
    if(x+y==0) return 0;
    cout << min(x,y) << ' ' << max(x, y) << endl;
    main();
}

```