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

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

*GRAMMAR*
lug -> YELLOW 
 tufa -> RED 
 zup -> BLUE 
 wif -> GREEN 
 u1 kiki u2 -> [u2] [u1] 
 x1 gazzer x2 -> [x1] [x2] 
 x1 dax -> [x1] [x1] 
 u1 x1 -> [u1] [x1] 
 