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)

var input=require("fs").readFileSync("/dev/stdin","utf8");
var i,j;

input=input.split("\n");

for(i=0;i<3000;i++){
    var x=input[i].split(" ");
    if(x[0]==0&&x[1]==0){
        break;
    }
    if(x[0]>x[1]){
        j=x[0];
        x[0]=x[1];
        x[1]=j;
    }
    console.log("%d %d",x[0],x[1]);
}