#include <stdio.h>
#include <iostream>

int main()
{
int a,b;
   while(1){
   	scanf("%d %d",&a,&b);
   	if((a|b)==0)break;
   	if(b<a)std::swap(a,b);
   	printf("%d %d\n",a,b);
    }
}

### 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>
#include <iostream>

int main()
{
int a,b;
   while(1){
   	scanf("%d %d",&a,&b);
   	if((a|b)==0)break;
   	if(b<a)std::swap(a,b);
   	printf("%d %d\n",a,b);
    }
}

```