*SUPPORT*
IN: wif zup fep fep tufa dax kiki OUT: GREEN PURPLE PURPLE PINK BLUE
IN: tufa OUT: BLUE
IN: kiki zup kiki OUT: PINK PINK
IN: fep dax tufa zup tufa lug OUT: BLUE PURPLE BLUE BLUE
IN: wif fep dax wif OUT: GREEN GREEN PURPLE
IN: fep tufa dax wif OUT: PURPLE GREEN BLUE
IN: fep dax tufa lug OUT: BLUE PURPLE BLUE PURPLE
IN: wif wif dax kiki OUT: GREEN PINK GREEN
IN: wif dax fep zup tufa dax tufa OUT: PURPLE GREEN BLUE BLUE
IN: fep lug OUT: PURPLE PURPLE
IN: fep dax fep lug OUT: PURPLE PURPLE PURPLE PURPLE
IN: kiki lug OUT: PINK PINK
IN: tufa dax tufa OUT: BLUE BLUE
IN: fep OUT: PURPLE

*QUERY*
IN: fep fep dax kiki OUT: PURPLE PINK PURPLE
IN: kiki dax tufa OUT: BLUE PINK
IN: fep dax kiki OUT: PINK PURPLE
IN: wif lug zup wif lug OUT: GREEN GREEN GREEN GREEN
IN: tufa tufa tufa fep OUT: BLUE BLUE BLUE PURPLE
IN: wif OUT: GREEN
IN: fep tufa lug OUT: PURPLE BLUE PURPLE BLUE
IN: wif wif OUT: GREEN GREEN
IN: fep dax wif lug OUT: GREEN PURPLE GREEN PURPLE
IN: tufa kiki lug OUT: BLUE PINK BLUE PINK

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