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

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

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