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

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

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