Score : $100$ points

Problem Statement

Takahashi has two integers $X$ and $Y$.

He computed $X + Y$ and $X - Y$, and the results were $A$ and $B$, respectively.

Now he cannot remember what $X$ and $Y$ were. Find $X$ and $Y$ for him.

Constraints

• $-100 \leq A, B \leq 100$
• For the given integers $A$ and $B$, there uniquely exist integers $X$ and $Y$ such that $X + Y = A$ and $X - Y = B$.
• All values in input are integers.

Input

Input is given from Standard Input in the following format:

$A$ $B$

Output

Print $X$ and $Y$.

2 -2

0 2

If $X = 0$ and $Y = 2$, they match the situation: $0 + 2 = 2$ and $0 - 2 = -2$.

3 1

2 1