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

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

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