Marcha atras.

                                         De,
                                         cuando,
                                         a,
                                         veces,
                                         tienes,
                                         que,
                                         dar,
                                         marcha,
                                         atrás,
                                         ya,
                                         sea,
                                         por,
                                         un,
                                         muro,
                                         o,
                                         por,
                                         un,
                                         precipicio.