$$unperonnhhdd$$
$eoprun^{3}\left(dh\right)^{2}$
$$un^{2}peronhhdd$$
$$un^{3}perohhdd$$
$$un^{3}peroh^{2}dd$$
$$un^{3}peroh^{2}d^{2}$$
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$eoprn^{3}\left(dh\right)^{2}$