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

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

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