class Point3D {
  float x, y, z;

  Point3D(float x, float y, float z) {
    this.x = x;
    this.y = y;
    this.z = z;
  }
  
  Point3D() {}
  
  
  
  public String toString() {
    String s = new String();
    s = "x: " + x + "  y: " + y + "  z: " + z;
    return s;
  }
}