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

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

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