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

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

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