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 JavaScript (judge verdict: Wrong Answer)

process.stdin.resume();
process.stdin.setEncoding('utf8');
// ???????????????????¨??????§
// Let's ?????£??¬????????????
process.stdin.on('data', function (chunk) {
    var line = chunk.toString().split("\n");
    var x = parseInt(line[0],10);
    var y = parseInt(line[1],10);


  for(var i = 0; i < line.length; i++){
     if(x == 0 && y == 0 ){break;}
      
     console.log(Math.max(x,y)+" "+Math.min(x,y));
   }

   
});