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HTML

<SELECT style="float:left" MULTIPLE SIZE=5>
 <OPTION VALUE="o1">8
 <OPTION VALUE="o2">9
 <OPTION VALUE="o3">10
 <OPTION VALUE="o4">11
 <OPTION VALUE="o5">12
 <OPTION VALUE="o6">13
</SELECT>
     
     <SELECT style="float:left" MULTIPLE SIZE=5>
 <OPTION VALUE="o1">15
 <OPTION VALUE="o2">30
 <OPTION VALUE="o3">45
 <OPTION VALUE="o4">00
</SELECT>