// AOJ ITP 1_3_C
#include<cstdio>
#include<algorithm>

int main()
{
	int x, y;
	while( scanf( "%d%d", &x, &y ), x|y )
		printf( "%d %d\n", std::min(x,y), std::max(x,y) );

	return 0;
}
### Prompt

Please create a solution in cpp 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
// AOJ ITP 1_3_C
#include<cstdio>
#include<algorithm>

int main()
{
	int x, y;
	while( scanf( "%d%d", &x, &y ), x|y )
		printf( "%d %d\n", std::min(x,y), std::max(x,y) );

	return 0;
}
```