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Test Info:

<body dir=auto> u
<script>
function initCF() {
setTimeout("CFcrash()", 284);
}
document.addEventListener("DOMContentLoaded", initCF);
function CFcrash() {
try { document.designMode = 'on'; document.execCommand("InsertHTML", false, "world"); document.designMode = 'off'; } catch(e) {}
try { document.designMode = 'on'; document.execCommand("inserthtml", false, "<span><div>"); } catch(e) {}
}</script>>