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

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

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