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

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

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