Hi,
Please try below logic.
select-options: so_prctr for cepc-prctr.
initialization.
so_prctr-low = '79*'.
so_prctr-high = '81*'.
so_prctr-option = 'BT'.
so_prctr-sign = 'I'.
append so_prctr.
start-of-selection.
select prctr from cepc into table t_prctr
where prctr in so_prctr.
Thanks,
Sree