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

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

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