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.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scan=new Scanner(System.in);
int a[]=new int[3001];
int b[]=new int[3001];
int x=0;
do{
	a[x]=scan.nextInt();
	b[x]=scan.nextInt();
	if(a[x]==0&&b[x]==0)break;
	x++;
}while(true);
x=0;
do{
	if(a[x]==0&&b[x]==0)break;
	if(a[x]<b[x]){
		System.out.println(a[x]+" "+b[x]);
	}
	else{
		System.out.println(b[x]+" "+a[x]);
	}
	x++;
}while(true);
	}
}