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

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

*GRAMMAR*
fep -> PURPLE 
 gazzer -> GREEN 
 lug -> BLUE 
 wif -> YELLOW 
 u1 tufa -> [u1] [u1] 
 u1 zup u2 -> [u1] [u2] 
 x1 dax x2 -> [x2] [x2] [x1] [x1] 
 u1 x1 -> [u1] [x1] 
 