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

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

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