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

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

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