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

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

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