Hi
Perhaps something like this can help you:
DATA: BEGIN OF ITAB OCCURS 0,
KEY(2) TYPE C,
END OF ITAB.
DATA: NUM_CHECK TYPE I.
DATA: NUM2(2) TYPE N.
DATA: NUM(1) TYPE N.
DATA: OFFSET TYPE I.
PARAMETERS: P_TIMES TYPE I.
DO P_TIMES TIMES.
SORT ITAB BY KEY DESCENDING.
READ TABLE ITAB INDEX 1.
IF SY-SUBRC <> 0.
ITAB-KEY = '01'.
ELSE.
IF ITAB-KEY CO '0123456789'.
MOVE ITAB-KEY TO NUM_CHECK.
IF NUM_CHECK < 99.
NUM_CHECK = NUM_CHECK + 1.
MOVE NUM_CHECK TO NUM2.
MOVE NUM2 TO ITAB-KEY.
ELSE.
ITAB-KEY = 'A1'.
ENDIF.
ELSE.
MOVE ITAB-KEY+1 TO NUM.
IF NUM < 9.
NUM = NUM + 1.
ITAB-KEY+1(1) = NUM.
ELSE.
OFFSET = OFFSET + 1.
ITAB-KEY(1) = SY-ABCDE+OFFSET(1).
ITAB-KEY+1(1) = '1'.
ENDIF.
ENDIF.
ENDIF.
APPEND ITAB.
ENDDO.
SORT ITAB BY KEY.
LOOP AT ITAB.
WRITE: / ITAB-KEY.
ENDLOOP.
Max