Chef and Donation

In a certain month, Chef earned $X$ rupees while Chefina earned $Y$ rupees such that $Y\gt X$. Since they want to end up with **exactly** the same amount, they decide to donate the difference between their income to a charity. Find the amount they donate in the month. ### Input - The first line of input will contain a single integer $T$, denoting the number of test cases. - Each test case cons