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

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

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