#include<stdio.h>
int main()
{
	int a,b,temp;
	while(scanf("%d%d",&a,&b)!=EOF&&(a||b))
	{
		temp=0;
		if(a>b)
		{
			temp=a;a=b;b=temp;
		}
		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,temp;
	while(scanf("%d%d",&a,&b)!=EOF&&(a||b))
	{
		temp=0;
		if(a>b)
		{
			temp=a;a=b;b=temp;
		}
		printf("%d %d\n",a,b);
	}
	return 0; 
}
```