Problem:
Swapping Two Numbers

Write a program which reads two integers x and y, and prints them in ascending order.

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.

Constraints

0 ≤ x, y ≤ 10000

the number of datasets ≤ 3000

Sample Input

3 2
2 2
5 3
0 0

Sample Output

2 3
2 2
3 5

Solution in C (judge verdict: Time Limit Exceeded)

#include <stdio.h>

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