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

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

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