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 Python (judge verdict: Accepted)


n = 0
i = 0
while (n == 0): 
 
    i = i + 1
 
    data = map(int, raw_input().split())
    x = data[0]
    y = data[1]
 
    if(x == 0 and y == 0):
        break
    else:
        if x > y:
            print "%s %s" % (y, x)
        else:
            print "%s %s" % (x, y)