ALV Report Output

Hi,

Currently i am getting the output like this in ALV.

Cust.No Mat.No Mat.Desc
10000    10101   Desc-1
10000    10102   Desc-2
10001    10101   Desc-1
10001    10105   Desc-5
10001    10106   Desc-6
10002    10104   Desc-4
10002    10105   Desc-5

But i want output like this in ALV.

Cust.No Mat.No Mat.Desc
10000    10101   Desc-1
         10102   Desc-2
10001    10101   Desc-1
         10105   Desc-5
         10106   Desc-6
10002    10104   Desc-4
         10105   Desc-5