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

### 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 <iostream>
using namespace std;
int x;
int y;
int main(){
	while(cin >> x >> y && (x!=0 || y!=0)){
	
		if(x>=y){
		cout <<y<<" "<<x<<endl;}
		else cout<<x<<" "<<y<<endl; 
	}
}

```