#include<iostream>
   
using std::cin;
using std::cout;
using std::endl;
   
int main()
{
int x,y;
   
while(cin>>x>>y&&!(x==0&&y==0))
{
if(x>y)std::swap(x,y);
cout<<x<<" "<<y<<endl;
}
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<iostream>
   
using std::cin;
using std::cout;
using std::endl;
   
int main()
{
int x,y;
   
while(cin>>x>>y&&!(x==0&&y==0))
{
if(x>y)std::swap(x,y);
cout<<x<<" "<<y<<endl;
}
return 0;
}
```