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

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

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