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

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

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