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

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

*GRAMMAR*
fep -> GREEN 
 wif -> RED 
 kiki -> PURPLE 
 dax -> BLUE 
 x1 tufa x2 -> [x1] [x1] [x2] 
 x1 lug -> [x1] [x1] 
 u1 zup -> [u1] [u1] 
 u1 x1 -> [u1] [x1] 
 