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

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

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