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

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

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