Try running this snippet and see the list output.
- DATAindexTYPEi.
- DATA str TYPE string.
- DATA digit TYPEi.
- DATA char TYPEc.
- DO1000TIMES.
- CLEAR str.
- index = sy-index.
- DO.
- digit = ( index - 1 ) MOD26.
- char = sy-abcde+digit(1).
- CONCATENATE char str INTO str.
- index = ( index - 1 ) DIV26.
- IFindexEQ0.
- EXIT.
- ENDIF.
- ENDDO.
- WRITE / str.
- ENDDO.
/.