#include<iostream>
using namespace std;
 
int main(){
    int a,b,i=1;
    cin>>a>>b;
    while(a!=0||b!=0){
if (a>b) swap(a,b);
cout<<a<<" "<<b<<endl;
        i++;
cin>>a>>b;
    }
    return 0;
}

### Prompt

Develop a solution in CPP 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 a,b,i=1;
    cin>>a>>b;
    while(a!=0||b!=0){
if (a>b) swap(a,b);
cout<<a<<" "<<b<<endl;
        i++;
cin>>a>>b;
    }
    return 0;
}

```