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

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

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