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

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

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