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

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

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