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

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

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