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

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

*GRAMMAR*
tufa -> BLUE 
 zup -> YELLOW 
 dax -> RED 
 gazzer -> GREEN 
 x1 wif x2 -> [x2] [x1] 
 u1 blicket u2 -> [u1] [u2] [u1] [u2] 
 x1 fep x2 -> [x1] [x2] [x1] [x2] 
 u1 x1 -> [u1] [x1] 
 