Simple Abap coding required.

Hi Gurus,

Can somebody advise me how to make changes to existing coeds,

Existing code:

<b>DATA: leve10 type STRING,

REST type STRING.

split costcenter1 at '-' into level10 REST.

CASE LEVEL1.

WHEN 'CK'.

RESP = 'Z'.

WHEN 'JK'.

RESP = 'Y'.

WHEN NONE.

MRU = 'NONE'.

ENDCASE.

ENDFUNCTION.</b>

I want to Insert

<b>WHEN 'FK' or 'MK' or 'SK'

RESP = 'NIL'</b>

can you pelase advise me how to do that?