.contenedor#lic {
  position: relative;
  height: 290px;
  float: left;
}


.contenedor#rs {
  position: relative;
  height: 100px;
  float: left;
}

.contenedor img {
  position: absolute;
  left: 0;
  transition: opacity 0.1s ease-in-out;
}

.contenedor img.top:hover {
  opacity: 0;
}