td {font-family: Arial, Helvetica, Courier, sans-serif;
    font-size: 100%}
    
h1  {font-family: Arial, Helvetica, Courier, sans-serif;
    font-size: 250%}

h2  {font-family: Arial, Helvetica, Courier, sans-serif;
    font-size: 150%}

.back {font-family: Arial, Helvetica, Courier, sans-serif;
       font-size: 100%;
       line-height: 200%;
       text-align: center}