The term 'Luau Strings' refers to the traditional Hawaiian string instruments used in a luau, which is a Hawaiian feast or party. The two instruments are the uke (3 letters) and the ukes (4 letters). The uke is a small, four-stringed instrument that is typically strummed with the fingers. The ukes is a larger, eight-stringed instrument that is usually plucked with a plectrum. Both instruments are integral to the traditional Hawaiian music that is played at luaus.