Requirement: To get the unique rows from 2 columns of a file
1. No records from col-1 if the value is occuring more than once in col-1.
2. No records from col-2 if the value is occuring more than once in col-2.
Example of input is given below:
Col-1 Col-2
-------------
A1 B1
A1 B2
A2 B3
A3 B3
A4 B4
A5 B5
A6 B1
A1 B6
A7 B7
A8 B8
Sample expected Output:
Col-1 Col-2
-------------
A4 B4
A5 B5
A7 B7
A8 B8