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

Your task is to create a Cpp solution 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, c;
while (1)
{
scanf("%d", &a);
scanf("%d", &b);
if (a == 0&&b == 0)
break;
else if (a > b){
c = a;
a = b;
b = c;
}
printf("%d %d\n", a, b);
}
return 0;
}
```