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

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

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