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

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

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