Margin two
Margin right two
Margin bottom two
Margin horizontal two
Margin vertical two
<div class="m2">Margin two</div>
<div class="mr2">Margin right two</div>
<div class="mb2">Margin bottom two</div>
<div class="mh2">Margin horizontal two</div>
<div class="mv2">Margin vertical two</div>spacing.css, line 100