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.*;
import java.util.Scanner;
 
public class Main {
    public static void print() {
        Scanner sc = new Scanner(System.in);
        int a, b;
        while (true) {
            a = sc.nextInt();
            b = sc.nextInt();
 
            if(a == 0 && b == 0)break;
            System.out.println("" + Math.min(a,b) + " " + Math.max(a,b));
        }
    }
 
    public static void main (String[] args) {
        // Scanner sc = new Scanner(System.in);
        // int W = sc.nextInt();
        // int H = sc.nextInt();
        // int x = sc.nextInt();
        // int y = sc.nextInt();
        // int r = sc.nextInt();
        print();
    }
}