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

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

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