.a{
	box-sizing: content-box;
	visibility: visible;
}
.a{
	tab-size: 5;
	visibility: visible;
	box-sizing: border-box;
}
.b{
	margin-left: 6pt;
	visibility: hidden;
}
.b{
	margin-left: 7em;
	tab-size: 5pt;	
}
.b{
	margin-left: 7em;
	tab-size: 6em;
	visibility: visible;
}
.b{
	visibility: hidden;
	tab-size: 7px;
}