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

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

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