Center of rectangle X90614

Using the definitions

class Point:
    """attributes: x, y"""

class Rectangle:
    """attributes: width, height, corner"""

write a function

find_center(r)

that returns a point containing the coordinates of the center of a rectangle $r$. For example, the center of a rectangle of width $100$, height $200$, and lower-left corner $(0, 0)$, is the point $(50, 100)$.

Input

The input consists of several rectangles (four non-negative integer numbers: the width, the height, and the coordinates of the lower-left corner).

Output

For each rectangle, print the coordinates of the center (two non-negative real numbers).