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

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

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