#include<iostream>
using namespace std; 
int main() {
{ int x,y; while(1)
{cin>>x>>y; 
if(x==0 && y==0)break; 
if(x>=y)cout<<y<<" "<<x<<endl;
else cout<<x<<" "<<y<<endl; } 
return 0; } 
		
	
}

### Prompt

Please provide a CPP coded solution to the problem described below:

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<iostream>
using namespace std; 
int main() {
{ int x,y; while(1)
{cin>>x>>y; 
if(x==0 && y==0)break; 
if(x>=y)cout<<y<<" "<<x<<endl;
else cout<<x<<" "<<y<<endl; } 
return 0; } 
		
	
}

```