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

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

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