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<!DOCTYPE html>
<html>
<head>
<script>
function repeatChar(s, n)
{
while (s.length < n)
s += s;
return s.substr(0, n);
}
function boom()
{
document.documentElement.contentEditable = "true";
document.execCommand("inserthtml", false, "<button><\/button>");
document.execCommand("inserthtml", false, repeatChar("i", 34646));
document.execCommand("contentReadOnly", false, null);
document.execCommand("removeformat", false, null);
document.execCommand("hilitecolor", false, "red");
document.execCommand("inserthtml", false, "a");
document.execCommand("delete", false, null);
}
</script>
</head>
<body onload="boom();"></body>
</html>
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