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 JAVA (judge verdict: Accepted)

import java.util.*;
import java.lang.*;
  
public class Main{
  public static void main(String[] args){
    Scanner stdIn=new Scanner(System.in);
    int i=0,x=stdIn.nextInt(),y=stdIn.nextInt();
    while(x!=0||y!=0){
	if (x>y){
	    System.out.println(y+" "+x);
	}else{
	    System.out.println(x+" "+y);
	}
	x=stdIn.nextInt();y=stdIn.nextInt();
    }
  }
}