#letters {
      z-index: 1;
      width:400px;
      height:500px;
      border: 1px solid black;
    }
    #t1{
      z-index: 2;
      position: absolute;
      background-color: black;
      top: 110px;
      left: 200px;
      width: 20px;
      height: 180px;
    }
    #t2{
      z-index: 2;
      position: absolute;
      background-color: black;
      top: 130px;
      left: 180px;
      width: 60px;
      height: 20px;
    }