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<!DOCTYPE html>
<html>
<style>
div {
display: block;
width: 100px;
height: 50px;
background-color: red;
}
</style>
<div></div>
<!DOCTYPE html>
<html>
<style>
div {
display: block;
width: 100px;
height: 50px;
background-color: red;
}
</style>
<div></div>