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

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

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