Identify dynamically dupalicate entry of internal table

Hi experts ,

First of all happy Diwali.

I need you guy's help.

Actually my requirement is that I have my final internal table. I am displaying it my alv.

First internal table

exp :

Column A B C D E

10 7 1 3 5

2 4 4 7 8

now I have one more internal table with only one column in which it is containing the field name of first internal table dynamically ( Means my second internal table can may be ( A , B ) or may ( A and E ) in

Eg. Col1 or col1

A A

B E

Now I want to find duplicate entry from my first internal table for only those field of my table which are in my second tables Col1 like ( A and B) or ( A and E)

Please help me .

Thanks and Regards

Bipin