#include <bits/stdc++.h>

using namespace std;

int main() {
	for (int x, y; cin >> x >> y && (x || y);) {
		if (x > y) {
			swap(x, y);
		}
		cout << x << ' ' << y << '\n';
	}
}

### 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 <bits/stdc++.h>

using namespace std;

int main() {
	for (int x, y; cin >> x >> y && (x || y);) {
		if (x > y) {
			swap(x, y);
		}
		cout << x << ' ' << y << '\n';
	}
}

```