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

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

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