#include <stdio.h>

int n, m;

int main() {
  while (true) {
    scanf("%d%d", &n, &m);
    if (!n && !m) return 0;
    if ( n > m ) n ^= m ^= n ^= m;
    printf("%d %d\n", n, m);
  }
}
### Prompt

Develop a solution in Cpp 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 <stdio.h>

int n, m;

int main() {
  while (true) {
    scanf("%d%d", &n, &m);
    if (!n && !m) return 0;
    if ( n > m ) n ^= m ^= n ^= m;
    printf("%d %d\n", n, m);
  }
}
```