#include<stdio.h>
 
int main(){
  int a, b, t;
  while(1){
    scanf("%d %d\n", &a, &b);
    if(a==0 && b==0)return 0;
    if(a>b){t=a;a=b;b=t;}
    printf("%d %d\n", a, b);
  }
}

### Prompt

Please create a solution in CPP to 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<stdio.h>
 
int main(){
  int a, b, t;
  while(1){
    scanf("%d %d\n", &a, &b);
    if(a==0 && b==0)return 0;
    if(a>b){t=a;a=b;b=t;}
    printf("%d %d\n", a, b);
  }
}

```