*SUPPORT*
IN: lug zup tufa OUT: BLUE YELLOW YELLOW
IN: zup tufa OUT: YELLOW YELLOW
IN: kiki OUT: RED
IN: kiki lug gazzer kiki OUT: RED RED BLUE
IN: wif lug tufa OUT: PINK BLUE BLUE
IN: wif gazzer lug OUT: BLUE PINK
IN: wif gazzer kiki OUT: RED PINK
IN: zup gazzer zup OUT: YELLOW YELLOW
IN: kiki gazzer wif OUT: PINK RED
IN: kiki dax OUT: RED RED RED
IN: kiki gazzer kiki OUT: RED RED
IN: lug wif kiki OUT: BLUE PINK RED
IN: lug dax OUT: BLUE BLUE BLUE
IN: lug OUT: BLUE

*QUERY*
IN: wif tufa OUT: PINK PINK
IN: zup lug kiki lug lug gazzer lug OUT: YELLOW BLUE RED BLUE BLUE BLUE
IN: lug tufa OUT: BLUE BLUE
IN: zup dax OUT: YELLOW YELLOW YELLOW
IN: kiki gazzer zup OUT: YELLOW RED
IN: lug zup gazzer kiki OUT: BLUE RED YELLOW
IN: zup gazzer kiki OUT: RED YELLOW
IN: lug gazzer wif OUT: PINK BLUE
IN: zup gazzer wif OUT: PINK YELLOW
IN: kiki tufa OUT: RED RED

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