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 C (judge verdict: Time Limit Exceeded)

#include<stdio.h>
int main()
{
    int i,x,y;
    for(i = 1;;i++){
        scanf("%d %d",&x,&y);
        if(x < y){
            printf("%d %d\n",x,y);
        }
        else if(y < x){
            printf("%d %d\n",y,x);
        }
        else if(x == y){
            printf("%d %d\n",x,y);
        }
        else if(x == 0 && y == y)break;


    }


    return 0;
}