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<b>let </b><font color="Maroon">x1</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">x2</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">x3</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">x4</font> be    <a href="hidden.html#M1">set</a> ;<br/>







<b>thus </b><span class="p1"><a href="enumset1.html#K2" target="_self">{</a><span class="default"><font color="Maroon">x1</font>,<font color="Maroon">x2</font>,<font color="Maroon">x3</font>,<font color="Maroon">x4</font></span><a href="enumset1.html#K2" target="_self">}</a></span> = 
<span class="p1"><a href="enumset1.html#K2" target="_self">{</a><span class="default"><font color="Maroon">x3</font>,<font color="Maroon">x2</font>,<font color="Maroon">x1</font>,<font color="Maroon">x4</font></span><a href="enumset1.html#K2" target="_self">}</a></span>
<b>by </b><i><a class="ref" href="enumset1.html#T80" target="_self">Th80</a></i>
<br/>.= 
<span class="p1"><a href="enumset1.html#K2" target="_self">{</a><span class="default"><font color="Maroon">x3</font>,<font color="Maroon">x4</font>,<font color="Maroon">x2</font>,<font color="Maroon">x1</font></span><a href="enumset1.html#K2" target="_self">}</a></span>
<b>by </b><i><a class="ref" href="enumset1.html#T75" target="_self">Th75</a></i>
;<br/>


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