Group by values

Question

Hi

  I have below data .

Group 5C

Group 5B

Group 3C

Group 4C

Group 3E

Group 5C(i)

Group 4C(i)

I want to get data like this 

Group 5C , Group 5C(i)

Group 5B

Group 3C

Group 4C , Group 4C(i)

Group 3E

Thanks