<?xml version="1.0"?> 
<TOP>a
   <ONE>b
      <TWO>c
         <THREE>d</THREE>
         <FOUR>e</FOUR>
      </TWO>f
      <FIVE>g
         <SIX>h</SIX>
         <SEVEN/>i
      </FIVE>j
      <EIGHT/>k
   </ONE>l
   <NINE/>m
   <TEN>n
      <ELEVEN>o
         <TWELVE>p</TWELVE>
      </ELEVEN>q
      <THIRTEEN/>r
   </TEN>s
   <FOURTEEN>t</FOURTEEN>
</TOP>
