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

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

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