#include<stdio.h>
int main(){
	int x,y,i;
	for(i=0;i<10000;i++){
		scanf("%d %d",&x,&y);
		if(x==0&&y==0) break;
		if(x > y)printf("%d %d\n",y,x);
		else printf("%d %d\n",x,y);
	}
	return 0;	
}
### Prompt

Construct a cpp code solution to the problem outlined:

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 x,y,i;
	for(i=0;i<10000;i++){
		scanf("%d %d",&x,&y);
		if(x==0&&y==0) break;
		if(x > y)printf("%d %d\n",y,x);
		else printf("%d %d\n",x,y);
	}
	return 0;	
}
```