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

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

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