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

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

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