#include<stdio.h>

int main() {
	int a, b;
	while (1) {
		scanf("%d %d",&a,&b);
		if ((!a)&&(!b)) break;
		if (a < b) printf("%d %d\n", a, b);
		else printf("%d %d\n", b, a);
	}
	return 0;
}

### Prompt

Please provide a cpp coded solution 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<stdio.h>

int main() {
	int a, b;
	while (1) {
		scanf("%d %d",&a,&b);
		if ((!a)&&(!b)) break;
		if (a < b) printf("%d %d\n", a, b);
		else printf("%d %d\n", b, a);
	}
	return 0;
}

```