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

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

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