-->
 <span style="color: #004080;">string</span> <span style="color: #000000;">one</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"feed"</span>
 <span style="color: #004080;">string</span> <span style="color: #000000;">two</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">one</span>     <span style="color: #000080;font-style:italic;">-- (two becomes "feed", one remains "feed")</span>
 <span style="color: #000000;">two<span style="color: #0000FF;">[<span style="color: #000000;">2<span style="color: #0000FF;">..<span style="color: #000000;">3<span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"oo"</span>     <span style="color: #000080;font-style:italic;">-- (two becomes "food", one remains "feed")</span>
 <span style="color: #000000;">one<span style="color: #0000FF;">[<span style="color: #000000;">1<span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">'n'</span>         <span style="color: #000080;font-style:italic;">-- (two remains "food", one becomes "need")</span>
 <span style="color: #0000FF;">?<span style="color: #0000FF;">{<span style="color: #000000;">one<span style="color: #0000FF;">,<span style="color: #000000;">two<span style="color: #0000FF;">}
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