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

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

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