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

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

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