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

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

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