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

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

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