#include <bits/stdc++.h>
using namespace std;

int main() {
  int a,b;
  for (int i = 0;; i++) {
    cin>>a>>b;
    if (a==0 && b==0) return 0;
    else cout<<min(a,b)<<" "<<max(a,b)<<endl;
  }
}


### Prompt

Please formulate 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 <bits/stdc++.h>
using namespace std;

int main() {
  int a,b;
  for (int i = 0;; i++) {
    cin>>a>>b;
    if (a==0 && b==0) return 0;
    else cout<<min(a,b)<<" "<<max(a,b)<<endl;
  }
}


```