removing duplicates within a cell in Adobe livecycle designer

I have a table with 3 columns and rows row1, row2 and row3. The third column consist of a sub-form each with radio buttons, text boxes etc. The cell3 within the subform of each row has a text populated based on radio button selection. I would like to have a text field outside table which would concatenate the texts from the 3 Cell3 and remove the duplicates. Based on this cell value the body of the form would automatically populate. Can anyone please help me with this?

Thanks