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

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

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