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

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

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