Hi arunshankar.c. Before I take the time away from my work and my kids to work your problem for you, could you show me what steps you have already taken to solve your problem yourself?

If you're totally stuck and don't know where to begin, you should at least read the following:

• perlfaq4: How can I remove duplicate elements from a list or array? -- Some adaptation of the logic shown there will be helpful in this situation.
• Perl Reference Tutorial.
• Perl Data Structure Cookbook.
• Data::Dumper -- A means of visualizing your data-structure and the progress you're making toward coming up with a solution.

After spending an hour reading those and a half hour working on a solution yourself you couldn't possibly be totally stuck without having at least some code attempt to show for it. By showing us at what point you're stuck, we're able to help you over the hump. But by presenting us with a problem where you make no effort to show us where you are currently in the process we're left to assume that you would be better served by posting a job to a freelance site.

Refer to MJD's Good Advice and Maxims for Programmers: Lines #11095#11905, #11913, #11927, #11928, #11929, #11930, #11949, and #11957.