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

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

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