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

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

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