Need help in parsing text file with list to XML

[Ram Shanka]

I have a tricky situation, I have a text file which contains thousands of lines, each lines has delimiter as tab. Here is the text snapshot

line 1
  line2
  line3
      line4
  line5
  line6
      line7
          line8
line9
 

I want the xml as

 
<line 1>
  <line2/>
  <line3>
      <line4/>
  </line3>
  <line5/>
  <line6>
      <line7>
          <line8/>
      </line7>
  </line6>
</line1>
<line9/>

Any help on this is greatly appreciated.