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

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

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