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

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

*GRAMMAR*
gazzer -> RED 
 zup -> BLUE 
 dax -> GREEN 
 wif -> YELLOW 
 x1 blicket u1 -> [x1] [u1] 
 x1 tufa x2 -> [x1] [x2] 
 x1 fep u1 -> [u1] [x1] 
 u1 x1 -> [u1] [x1] 
 