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

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

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