#letters {
      z-index: 1;
      width:400px;
      height:500px;
      border: 1px solid black;
    }
    #number8{
      z-index: 2;
      position: absolute;
      top:290px;
      left: 180px;
      box-sizing: border-box;
      border: 20px solid black;
      width: 60px;
      height: 60px;
    }
    #number82{
      z-index: 2;
      position: absolute;
      top:330px;
      left: 180px;
      box-sizing: border-box;
      border: 20px solid black;
      width: 60px;
      height: 60px;
    }
    pre code {
      background-color: #eee;
      border: 1px solid #999;
      display: block;
      padding: 20px;
      width:400px;
    }