*SUPPORT*
IN: dax zup dax kiki fep OUT: BLUE YELLOW BLUE GREEN
IN: zup kiki zup kiki fep OUT: YELLOW YELLOW GREEN
IN: fep zup OUT: GREEN YELLOW
IN: fep tufa fep OUT: GREEN GREEN
IN: dax tufa fep OUT: BLUE GREEN
IN: zup kiki fep OUT: YELLOW GREEN
IN: dax zup tufa zup OUT: BLUE YELLOW YELLOW
IN: zup fep gazzer tufa dax OUT: YELLOW GREEN RED BLUE
IN: fep kiki dax kiki gazzer tufa fep OUT: GREEN BLUE RED GREEN
IN: dax lug gazzer gazzer kiki gazzer OUT: BLUE RED RED RED RED RED
IN: gazzer gazzer lug dax lug fep kiki gazzer OUT: RED RED BLUE BLUE GREEN GREEN RED
IN: gazzer lug gazzer kiki dax OUT: RED RED RED BLUE
IN: fep kiki gazzer tufa fep tufa zup OUT: GREEN RED GREEN YELLOW
IN: dax lug gazzer tufa zup kiki fep OUT: BLUE RED RED YELLOW GREEN

*QUERY*
IN: zup tufa zup OUT: YELLOW YELLOW
IN: dax OUT: BLUE
IN: fep OUT: GREEN
IN: zup lug dax kiki dax kiki zup OUT: YELLOW BLUE BLUE BLUE YELLOW
IN: fep dax fep tufa dax OUT: GREEN BLUE GREEN BLUE
IN: dax lug zup kiki dax OUT: BLUE YELLOW YELLOW BLUE
IN: gazzer OUT: RED
IN: zup OUT: YELLOW
IN: dax dax OUT: BLUE BLUE
IN: fep fep OUT: GREEN GREEN

*GRAMMAR*
gazzer -> RED 
 zup -> YELLOW 
 dax -> BLUE 
 fep -> GREEN 
 x1 kiki u1 -> [x1] [u1] 
 x1 tufa u1 -> [x1] [u1] 
 x1 lug x2 -> [x1] [x2] [x2] 
 u1 x1 -> [u1] [x1] 
 