body {background-color: #FFFF99;
  color: #666600;}
  
h2 {color: #FF6600;}
  
.letras_minus {list-style-type: lower-alpha}

.cuadrado {list-style-type: square}
    
table {margin-left: 30%;
        width: 70%;
        border: 2px #cc0000 dotted;
        border-collapse: collapse}
        
td {border: 2px #0000ff dotted;
        padding: 10px; text-align: center}
        
th {background-color: #666666}
    
.dcha {text-align: right}
    
.sin {list-style-type: none}