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

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

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