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

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

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