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

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

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