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<!DOCTYPE HTML>
<style>
div { background: yellow }
span { background: aqua }
div { font-size: 34px; width: 450px }
</style>
<div><span>Hello world</span></div>
<!DOCTYPE HTML>
<style>
div { background: yellow }
span { background: aqua }
div { font-size: 34px; width: 450px }
</style>
<div><span>Hello world</span></div>