*SUPPORT*
IN: wif wif OUT: GREEN GREEN
IN: kiki fep dax tufa fep dax wif OUT: PURPLE PURPLE BLUE BLUE GREEN
IN: kiki fep OUT: PURPLE PURPLE
IN: kiki dax wif OUT: PURPLE GREEN
IN: lug fep OUT: RED RED
IN: kiki lug OUT: PURPLE RED
IN: lug dax kiki kiki fep OUT: RED PURPLE PURPLE PURPLE
IN: wif gazzer wif OUT: GREEN GREEN GREEN
IN: lug tufa kiki fep dax wif fep OUT: RED BLUE PURPLE PURPLE GREEN GREEN
IN: tufa dax lug tufa fep OUT: BLUE RED BLUE BLUE
IN: wif dax wif lug fep OUT: GREEN GREEN RED RED
IN: wif wif fep gazzer wif OUT: GREEN GREEN GREEN GREEN GREEN GREEN GREEN
IN: kiki dax lug gazzer tufa dax kiki fep OUT: PURPLE RED PURPLE RED BLUE PURPLE PURPLE
IN: tufa kiki tufa fep OUT: BLUE PURPLE BLUE BLUE

*QUERY*
IN: lug tufa OUT: RED BLUE
IN: tufa wif OUT: BLUE GREEN
IN: kiki gazzer tufa OUT: PURPLE PURPLE BLUE
IN: wif OUT: GREEN
IN: tufa OUT: BLUE
IN: kiki OUT: PURPLE
IN: tufa kiki dax lug fep OUT: BLUE PURPLE RED RED
IN: wif dax kiki fep OUT: GREEN PURPLE PURPLE
IN: lug gazzer kiki gazzer kiki OUT: RED RED PURPLE RED RED PURPLE PURPLE
IN: lug OUT: RED

*GRAMMAR*
lug -> RED 
 wif -> GREEN 
 tufa -> BLUE 
 kiki -> PURPLE 
 x1 gazzer u1 -> [x1] [x1] [u1] 
 x1 dax x2 -> [x1] [x2] 
 u1 fep -> [u1] [u1] 
 u1 x1 -> [u1] [x1] 
 