import static java.lang.Math.sqrt;

class Point {
  // Coordinates of the point
  double x;
  double y;

  // Create a point from coordinates
  Point(double xVal, double yVal) {
    x = xVal;
    y = yVal;
  }

  // Create a point from another Point object
  Point(final Point oldPoint) {
    x = oldPoint.x;                    // Copy x coordinate
    y = oldPoint.y;                    // Copy y coordinate
  }

  // Move a point
  void move(double xDelta, double yDelta) {
    // Parameter values are increments to the current coordinates
    x += xDelta;
    y += yDelta;
  }

  // Calculate the distance to another point
  double distance(final Point aPoint) {
    return sqrt((x - aPoint.x)*(x - aPoint.x) + (y - aPoint.y)*(y - aPoint.y));
  }

  // Convert a point to a string 
  public String toString() {
    return Double.toString(x) + ", " + y;    // As "x, y"
  }
}