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<!DOCTYPE html>
<html>
<body>
<p id="test">This is text</p>
<script>
function myfunction() {
document.getElementById("test").style.fontSize = "35px";
document.getElementById("test").style.color = "green";
}
</script>
<button type="button" onclick="myfunction()">Click Me!</button>
</body>
</html> 
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