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

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

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