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

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

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