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

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

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