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

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

*GRAMMAR*
dax -> PURPLE 
 tufa -> BLUE 
 lug -> YELLOW 
 zup -> GREEN 
 x1 fep x2 -> [x2] [x1] 
 x1 gazzer u1 -> [u1] [x1] 
 u1 wif x1 -> [u1] [x1] 
 u1 x1 -> [u1] [x1] 
 