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

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

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