Language: Java

import java.io.*;
??
class Main
{
????????public static void main (String[ ] args) throws Exception
    {
????????????????BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
        StringBuffer sb = new StringBuffer();
        
        while()
        {
            String[] strAry = br.readLine().split();
            int x = Integer.parseInt(strAry[0]);
            int y = Integer.parseInt(strAry[1]);
            
            if(0 == x && 0 == y)
            {
                break;
            }
            
            if(x > y)
            {
                sb.append(y + " " + x + "\n");
            }
            else
            {
                sb.append(x + " " + y + "\n");
            }
        }
????????????????System.out.println(sb);
    }
}

Compiler output:
Main.java:2: error: class, interface, enum, or record expected
??
^
Main.java:5: error: illegal start of type
????????public static void main (String[ ] args) throws Exception
^
Main.java:7: error: illegal start of expression
????????????????BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
^
Main.java:7: error: illegal start of expression
????????????????BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
 ^
Main.java:7: error: illegal start of expression
????????????????BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
  ^
Main.java:7: error: illegal start of expression
????????????????BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
   ^
Main.java:7: error: illegal start of expression
????????????????BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
    ^
Main.java:7: error: illegal start of expression
????????????????BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
     ^
Main.java:7: error: illegal start of expression
????????????????BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
      ^
Main.java:7: error: illegal start of expression
????????????????BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
       ^
Main.java:7: error: illegal start of expression
????????????????BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
        ^
Main.java:7: error: illegal start of expression
????????????????BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
         ^
Main.java:7: error: illegal start of expression
????????????????BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
          ^
Main.java:7: error: illegal start of expression
????????????????BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
           ^
Main.java:7: error: illegal start of expression
????????????????BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
            ^
Main.java:7: error: illegal start of expression
????????????????BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
             ^
Main.java:7: error: illegal start of expression
????????????????BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
              ^
Main.java:7: error: illegal start of expression
????????????????BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
               ^
Main.java:7: error: : expected
????????????????BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
                              ^
Main.java:7: error: : expected
????????????????BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
                                                                                          ^
Main.java:10: error: illegal start of expression
        while()
              ^
Main.java:30: error: illegal start of expression
????????????????System.out.println(sb);
^
Main.java:30: error: illegal start of expression
????????????????System.out.println(sb);
 ^
Main.java:30: error: illegal start of expression
????????????????System.out.println(sb);
  ^
Main.java:30: error: illegal start of expression
????????????????System.out.println(sb);
   ^
Main.java:30: error: illegal start of expression
????????????????System.out.println(sb);
    ^
Main.java:30: error: illegal start of expression
????????????????System.out.println(sb);
     ^
Main.java:30: error: illegal start of expression
????????????????System.out.println(sb);
      ^
Main.java:30: error: illegal start of expression
????????????????System.out.println(sb);
       ^
Main.java:30: error: illegal start of expression
????????????????System.out.println(sb);
        ^
Main.java:30: error: illegal start of expression
????????????????System.out.println(sb);
         ^
Main.java:30: error: illegal start of expression
????????????????System.out.println(sb);
          ^
Main.java:30: error: illegal start of expression
????????????????System.out.println(sb);
           ^
Main.java:30: error: illegal start of expression
????????????????System.out.println(sb);
            ^
Main.java:30: error: illegal start of expression
????????????????System.out.println(sb);
             ^
Main.java:30: error: illegal start of expression
????????????????System.out.println(sb);
              ^
Main.java:30: error: illegal start of expression
????????????????System.out.println(sb);
               ^
Main.java:30: error: : expected
????????????????System.out.println(sb);
                                      ^
38 errors