#include<stdio.h>
int main()
{
	int a,b,i;
	for(i=1;;i++)
	{
		scanf("%d %d",&a,&b);
		if (a==0&&b==0) break;
		if(a>b)  printf("%d %d\n",b,a);	
        else printf("%d %d\n",a,b);	
	}
	return 0;
}
### Prompt

Generate 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<stdio.h>
int main()
{
	int a,b,i;
	for(i=1;;i++)
	{
		scanf("%d %d",&a,&b);
		if (a==0&&b==0) break;
		if(a>b)  printf("%d %d\n",b,a);	
        else printf("%d %d\n",a,b);	
	}
	return 0;
}
```