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

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

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