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<!DOCTYPE html>
<style>
.container {
background: green;
height: 16px;
border: solid black 3px;
width: 400px;
margin: 16px 0;
}
.large { height: 32px; }
</style>
There should be no red.
<div class="container"></div>
<div class="container"></div>
<div class="container large"></div>
<div class="container large"></div>
<div class="container"></div>
<div class="container"></div>
<div class="container large"></div>
<div class="container large"></div>
<div class="container"></div>
<div class="container"></div>
<div class="container large"></div>
<div class="container large"></div>