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

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

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