X X
                            X        X
                           X             X
                          X                X
                         X  XXXX            X
                                 X
                        X  X       X         X
                        X  X        X        X
                            X    XX  X       X
                         X X  XX     X X
                          XX        X       X
                            X XXX  X        X
                             X    X         X
                               XX  XXXX      X
                         XXXX        X     XX
                     X                 XXX     X
                                                X
                    X                          XX
                                                X
                    X    X                       X
                                                   X
                    X     X      X                   XX
                                         X            X
                     X     X            X            X
                             X        X        X    X
                     X     X    X  X             XX
                     X      X                    X
                    X        X                  X
                    X      X                   X
                    X    X                   X