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.io.BufferedReader;
import java.io.InputStreamReader;
import java.lang.Math;

public class Main {
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringBuilder st = new StringBuilder();
        
        String[] ary = new String[2];
        int[] num = new int[2];
        
        while(true){
            ary = br.readLine().split(" ");
            //ary = inputStr.split(" ");
            num[0] = Integer.parseInt(ary[0]);
            num[1] = Integer.parseInt(ary[1]);
            
            if(num[0] == 0 && num[1] == 0){
                break;
            }
            
            System.out.println(Math.min(num[0], num[1]) + " " + Math.max(num[0], num[1]));
        }
        
    }
}