s="run"><span class="n"><a id="t6" href="#t6">6</a></span><span class="t"><span class="key">import</span> <span class="nam">os</span>&nbsp;</span><span class="r"></span></p>
    <p class="run"><span class="n"><a id="t7" href="#t7">7</a></span><span class="t"><span class="key">import</span> <span class="nam">sys</span>&nbsp;</span><span class="r"></span></p>
    <p class="pln"><span class="n"><a id="t8" href="#t8">8</a></span><span class="t">&nbsp;</span><span class="r"></span></p>
    <p class="pln"><span c