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Test Info:

<style>
#x {
-webkit-user-select: none;
word-break: break-word;
width: 0vh;
-webkit-perspective: 89px;
display: flex;
height: 1ch;
}
</style>
<script>
window.onload = () => {
document.execCommand("selectAll", false)
document.execCommand("selectAll", false)
document.execCommand("backColor", false, "r")
document.execCommand("superscript", false)
}
</script>
<dl style="columns:1px">
<dt id="x" contenteditable>aaa</dt>