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

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

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