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

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

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