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(){
  int x,y;
  while(1){
    if(x > y){scanf("%d %d", &x, &y);
      printf("%d %d\n", y, x);
    } else if(y > x){
      scanf("%d %d", &x, &y);
      printf("%d %d\n", x, y);  
    }    
  }
  while(0){
    if(x == 0 && y == 0)break;
  }
  
  return 0;
}