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<!DOCTYPE html>
<title>A reference of 100x100 blue box</title>
<style>
div {
width: 100px; height: 100px;
background: blue;
}
</style>
<div></div>
<!DOCTYPE html>
<title>A reference of 100x100 blue box</title>
<style>
div {
width: 100px; height: 100px;
background: blue;
}
</style>
<div></div>