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Test Info:

<!DOCTYPE html>
<html>
<head>
<script>
addEventListener("DOMContentLoaded", () => {
try {
document.designMode = 'on';
document.removeChild(document.documentElement);
document.appendChild(document.createElement("p"));
document.execCommand("insertParagraph", false, null);
} catch(e) {
}
});
</script>
</head>
</html>