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 Python3 (judge verdict: Wrong Answer)

c = 0
while True:
    a = input().split(' ')
    x = int(a[0])
    y = int(a[1])

    if (x and y) == 0:
        break;
    elif x < y:
        print(x,y)
    elif x > y:
        print(y,x)
    elif x == y:
        print(x,y)
    c += 1