## Description:

You have a Black and white rectangle of $$$ n * m $$$ .

As shown in the figure, there is a line segment connection coordinate $$$ (0,0) $$$ and coordinates $$$ (n , m) $$$ .

Please calculate the ratio of the black part to the length of the white part on this line segment .

## Input:

there are several test case . Each test cases is only one line , two integer $$$ N $$$,$$$ M $$$ ($$$1 \leq N , M \leq 1e9$$$) — the size of the rectangle.The input ends when $$$ N = 0 $$$and $$$ M = 0$$$.

## Output:

Two nonnegative integer $$$ P $$$ and $$$ Q $$$ separated by a "$$$ / $$$" — a irreducible fraction,represent the answer.

## Sample Input:

2 2
2 3
9 1
0 0

## Sample Output:

1/0
1/1
5/4