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

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

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