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

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

*GRAMMAR*
wif -> YELLOW 
 tufa -> RED 
 dax -> PURPLE 
 kiki -> GREEN 
 u1 lug x1 -> [x1] [u1] 
 u1 gazzer u2 -> [u2] [u1] 
 x1 fep x2 -> [x1] [x2] [x2] 
 u1 x1 -> [u1] [x1] 
 