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

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

*GRAMMAR*
dax -> RED 
 kiki -> GREEN 
 gazzer -> BLUE 
 tufa -> YELLOW 
 u1 zup u2 -> [u2] [u1] [u1] 
 x1 fep -> [x1] [x1] [x1] [x1] [x1] [x1] [x1] [x1] 
 x1 lug x2 -> [x1] [x2] [x2] [x1] [x1] 
 u1 x1 -> [u1] [x1] 
 