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

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

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