an class="s1">&#39;</span><span class="s">mixed-case input string is ....</span><span class="s1">&#39;</span>,<span class="nv">s</span>
    <span class="nv">write</span><span class="ss">(</span><span class="o">*</span>,<span class="o">*</span><span class="ss">)</span> <span class="s1">&#39;</span><span class="s">upper-case output string is ...</span><span class="s1">&#39;</span>,<span class="nv">upper</span><span class="ss">(</span><span class="nv">s</span><span class="ss">)</span>
    <span class="nv">writ