a:hover
{
	background: #ffff80;
}
html
{
	background: #bbbbbb;
}
body
{
	background: #ffe4c4;
	margin: 3%;
	border: solid thin black;
	padding: 1em;
}
p
{
	text-align: justify;
}
pre
{
	color: blue;
	margin-left: 3%;
	margin-right: 3%;
}
kbd
{
	color: blue;
}
.yes
{
	visibility: visible;
}
.no
{
	visibility: hidden;
}