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

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

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