<prompt> Translate the following text to SwahiliA sampling of duty-free shops can also be found at city centers and airports in Kuala Lumpur, Johor Bahru, and Penang.  <response>: Maduka ya bure ya ushuru pia yanaweza kupatikana katika vituo vya jiji na viwanja vya ndege huko Kuala Lumpur, Johor Bahru, na Penang. 