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 Ruby (judge verdict: Accepted)

while true
	
	aryMondai = gets.split.map(&:to_i);
	
	num1 = aryMondai[0];
	num2 = aryMondai[1];
	
	if num1 == 0 && num2 == 0 then
		break;
	end
	
	if num1 > num2 then
		puts num2.to_s + " " + num1.to_s;
	elsif num1 < num2 then
		puts num1.to_s + " " + num2.to_s;
	else
		puts num1.to_s + " " + num2.to_s;
	end
	
end