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

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

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