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

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

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