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

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

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