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

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

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