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

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

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