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

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

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