.grid-item:nth-child(even) {
    grid-row: span 1;
  }
  .grid-item:nth-child(odd) {
    grid-row: span 2;
  }
  
  .grid-item{
      position:relative
  }
  
  .grid-item-number{
      position:absolute;
      right:0;
      bottom:-14px;
  }