*SUPPORT*
IN: wif tufa dax OUT: YELLOW PURPLE
IN: dax OUT: PURPLE
IN: dax dax dax tufa zup fep OUT: PURPLE PURPLE PURPLE BLUE PURPLE PURPLE PURPLE BLUE
IN: lug wif wif OUT: GREEN YELLOW YELLOW
IN: lug fep gazzer OUT: GREEN GREEN GREEN GREEN
IN: zup tufa dax OUT: BLUE PURPLE
IN: lug tufa zup fep OUT: GREEN BLUE GREEN BLUE
IN: zup wif OUT: BLUE YELLOW
IN: wif wif OUT: YELLOW YELLOW
IN: wif lug tufa zup gazzer OUT: YELLOW GREEN BLUE YELLOW GREEN BLUE
IN: lug tufa lug OUT: GREEN GREEN
IN: lug dax OUT: GREEN PURPLE
IN: zup dax OUT: BLUE PURPLE
IN: zup lug OUT: BLUE GREEN

*QUERY*
IN: wif OUT: YELLOW
IN: zup tufa zup OUT: BLUE BLUE
IN: lug OUT: GREEN
IN: dax tufa dax OUT: PURPLE PURPLE
IN: dax lug tufa wif OUT: PURPLE GREEN YELLOW
IN: lug dax wif tufa dax OUT: GREEN PURPLE YELLOW PURPLE
IN: lug fep fep OUT: GREEN GREEN GREEN GREEN
IN: zup lug tufa lug OUT: BLUE GREEN GREEN
IN: dax dax zup dax gazzer OUT: PURPLE PURPLE BLUE PURPLE PURPLE PURPLE BLUE PURPLE
IN: zup OUT: BLUE

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