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

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

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