*SUPPORT*
IN: zup OUT: RED
IN: tufa zup blicket OUT: YELLOW RED RED
IN: fep blicket OUT: BLUE BLUE
IN: tufa zup OUT: YELLOW RED
IN: tufa gazzer fep OUT: BLUE YELLOW
IN: zup gazzer wif OUT: PURPLE RED
IN: wif gazzer fep OUT: BLUE PURPLE
IN: fep gazzer fep OUT: BLUE BLUE
IN: fep zup tufa gazzer tufa OUT: BLUE RED YELLOW YELLOW
IN: tufa OUT: YELLOW
IN: zup blicket dax zup OUT: RED RED RED
IN: zup gazzer tufa OUT: YELLOW RED
IN: wif OUT: PURPLE
IN: tufa gazzer zup OUT: RED YELLOW

*QUERY*
IN: zup zup blicket dax zup OUT: RED RED RED RED
IN: wif blicket OUT: PURPLE PURPLE
IN: fep gazzer zup OUT: RED BLUE
IN: zup gazzer fep OUT: BLUE RED
IN: zup blicket OUT: RED RED
IN: fep OUT: BLUE
IN: tufa blicket OUT: YELLOW YELLOW
IN: wif blicket dax fep OUT: PURPLE PURPLE BLUE
IN: tufa wif gazzer fep OUT: YELLOW BLUE PURPLE
IN: wif gazzer wif OUT: PURPLE PURPLE

*GRAMMAR*
zup -> RED 
 fep -> BLUE 
 wif -> PURPLE 
 tufa -> YELLOW 
 x1 dax u1 -> [x1] [u1] 
 u1 blicket -> [u1] [u1] 
 u1 gazzer u2 -> [u2] [u1] 
 u1 x1 -> [u1] [x1] 
 