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

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

*GRAMMAR*
kiki -> BLUE 
 wif -> GREEN 
 zup -> YELLOW 
 fep -> RED 
 x1 lug x2 -> [x1] [x2] [x1] [x1] [x2] [x1] 
 u1 tufa -> [u1] [u1] 
 u1 gazzer u2 -> [u1] [u2] 
 u1 x1 -> [u1] [x1] 
 