<span class="o">/</span><span class="s1">&#39; &#39;</span><span class="p">,</span><span class="w"> </span><span class="s1">&#39;*&#39;</span><span class="p">,</span><span class="w"> </span><span class="s1">&#39;-&#39;</span><span class="p">,</span><span class="w"> </span><span class="s1">&#39;I&#39;</span><span class="o">/</span>
<span class="c">!</span>
<span class="c">!     CHECK THE INPUT ARGUMENTS FOR ERRORS</span>
<span class="c">!</span>
<span class="w">      </span><span class="k">IF</span><span cla