#include<iostream>

int main(){

	int a, b;
	while (std::cin >> a >> b, a || b){

		std::cout << (a<b ? a : b) << " " << (a>b ? a : b) << std::endl;
	}
	return 0;
}
### Prompt

Create a solution in cpp for 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>

int main(){

	int a, b;
	while (std::cin >> a >> b, a || b){

		std::cout << (a<b ? a : b) << " " << (a>b ? a : b) << std::endl;
	}
	return 0;
}
```