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

*QUERY*
IN: dax wif tufa lug dax OUT: RED RED PURPLE RED RED
IN: zup OUT: GREEN
IN: zup lug zup OUT: GREEN GREEN GREEN
IN: kiki lug zup OUT: GREEN YELLOW GREEN
IN: tufa wif tufa wif zup OUT: PURPLE PURPLE GREEN PURPLE PURPLE
IN: dax wif zup lug zup OUT: RED GREEN GREEN GREEN RED
IN: dax wif zup lug kiki OUT: RED YELLOW GREEN YELLOW RED
IN: zup dax lug dax gazzer tufa lug zup OUT: GREEN PURPLE GREEN GREEN RED RED RED
IN: dax lug dax OUT: RED RED RED
IN: kiki zup OUT: YELLOW GREEN

*GRAMMAR*
tufa -> PURPLE 
 dax -> RED 
 kiki -> YELLOW 
 zup -> GREEN 
 u1 wif x1 -> [u1] [x1] [u1] 
 u1 lug u2 -> [u2] [u1] [u2] 
 x1 gazzer x2 -> [x2] [x1] 
 u1 x1 -> [u1] [x1] 
 