#include<cstdio>
int main(){
 int a,b;
 while(1){
  scanf("%d%d",&a,&b);
  if(!a&&!b)break;
  else if(a>b){
   int buf;
   buf = a;
   a = b;
   b = buf;
  }
  printf("%d %d\n",a,b);
 }
}
### Prompt

Create a solution in cpp for 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<cstdio>
int main(){
 int a,b;
 while(1){
  scanf("%d%d",&a,&b);
  if(!a&&!b)break;
  else if(a>b){
   int buf;
   buf = a;
   a = b;
   b = buf;
  }
  printf("%d %d\n",a,b);
 }
}
```