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

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

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