Given two integers and , find the real , such that is maximized, where
It can be proven that the maximum value is rational. Print it as the irreducible fraction.
Contains no more than test cases, following one after another and terminated of the end-of-file.
Each test case consists of one string, containing two integers and .
For each test case, print an irreducible fraction — the maximum value of .
In the first test case maximizes the function.